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Grade 6 Getting to Know Plants Worksheets

November 10, 2020November 10, 2020 by worksheetsbuddy_do87uk

A. Correct the following statements and rewrite them:

1. Stem absorbs water and minerals from the soil.
2. Leaves hold the plant upright.
3. Roots conduct water to the leaves.
4. The number of petals and sepals in a flower is always equal.
5. If the sepals of a flower are joined together, its petals are also joined together.
6. If the petals of a flower are joined together, then the pistil is joined to the petal.

B. Draw (i) a leaf, (ii) a tap root and (iii) a flower, you have studied:

C. Answer the following questions in short:

1. Can you find a plant in your house or in your neighbourhood, which has a long but a weak stem? Write its name. In which category would you classify it?
2. What is the function of a stem in a plant?
3. Which of the following leaves have reticulate venation?
(i) Wheat ……………….
(ii) Tulsi ………………..
(iii) Maize ……………..
(iv) Grass ………………
(v) Coriander ……………….
(vi) China rose ……………..
4. If a plant has fibrous root, what type of venation do its leaves likely to have?
5. If a plant has leaves with reticulate venation, what kind of roots will it have?
6. Is it possible for you to find out whether a plant has tap root or fibrous roots by looking at the impression of its leaf on a sheet of paper?
7. Write the names of the parts of a flower.
8. Which of the following plants have you seen? Of these that you have seen, which one have flowers?
Grass, maize, wheat, chilli, tomato, tulsi, pipal, shisham, banyan, mango, jamun, guava, pomegranate, papaya, banana, lemon, sugarcane, potato, groundnut
9. Name the part of the plant which produces its food. Name this process.
10. In which part of a flower, you are likely to find the ovary?
11. Name two flowers, each with joined and separated sepals.
12. How are creepers and climbers different from a herb, a shrub or a tree?
13. How can you find the types of roots of different plants looking at their roots?

D. Tick (✓) the correct option:

1. When pollen is transferred to the stigma of another flower, the process is called:
(a) conservation
(b) pollination
(c) germination
(d) fertilization

2. Which is the male part of the flower?
(a) Carpel
(b) Anther
(c) Stamen
(d) Filament

3. Seed is formed from:
(a) leaf
(b) flower
(c) ovary
(d) ovule

4. Rose plant is a:
(a) tree
(b) shrub
(c) herb
(d) climber

5. Which one of the following is the female part of the flower?
(a) Pistil
(b) Stamen
(c) Carpel
(d) Anther

E. Fill in the Blanks:

1. The two main parts of a flowering plant are the ………………….. system and the ………………. system.
2. The arrangement of veins in a leaf is called ……………… .
3. ……………… and ……………….. are the productive parts of a plant.
4. ……………… is the female part of the flower.
Leaves are green as they contain ………………… .

F. State True or False:

1. Fibrous root system has a main root. ……………………
2. Stigma, style and ovary are the parts of a stamen. ………………..
3. The plants with a hard but thin stem are called shrubs. ………………..
4. The topmost part of the pistil is called stigma. ………………..
5. Stem absorbs water and minerals from the air. ……………………..

G. Match the following:

‘A’	‘B’
1. Cotton is a	a. Herbs
2. Tap roots are found in	b. Leaf
3. Garlic is a	c. Onion
4. Fibrous roots are found in	d. Shrubs
5. The food factory of the plant	e. Radish

H. Give one word to each of the following parts of a leaf?

1. Green flat part of leaf. ……………………
2. Attaches leaf to the stem. …………………
3. Conduct food and water in the leaf. ………………
4. Thick vein in the middle. ………………….

I. Complete the following Table based on categories of plants:

J. Names of plant parts are hidden in this grid. Search for them by going up, down or even diagonally forward as well as backward. Have fun!

Worksheets for Class 6 Science

Grade 6 Changes Around Us Worksheets

November 10, 2020November 10, 2020 by worksheetsbuddy_do87uk

A. Answer the following questions in short:
1. To walk through a waterlogged area, you usually shorten the length of your dress by folding it. Can this change be reversed?
2. You accidently dropped your favourite toy and broke it. This is a change you did not want. Can this change be reversed?
3. A drawing sheet changes when you draw a picture on it. Can you reverse this change?
4. Give examples to explain the difference between changes that can or cannot be reversed.
5. A thick coating of a paste of Plaster of Paris (POP) is applied over the bandage on a fractured bone. It becomes hard on drying to keep the fractured bone immobilized. Can the change in POP be reversed? Why?
6. A bag of cement lying in the open gets wet due to rain during the night. The next day the sun shines brightly. Do you think the changes which have occurred in the cement, could be reversed?
7. Describe a reversible change that you can bring about by heating.
8. What do you understand by expansion and contraction? How all the three states are related to them?
9. How does a blacksmith change a piece of iron into different tools?

B. Some changes are listed in the following table. For each change, write in the blank column whether the change can be reversed or not:

C. Tick (✓) the Correct Option:

1. …………. is not an example of chemicai change.
(a) Burning of paper
(b) Melting of wax
(c) Ripening of mango
(d) Cooking of food

2. In a physical change:
(a) shape and colour of the substance may change
(b) composition of the substance does not change
(c) no new substance is formed
(d) all of the above

3. Heat can change:
(a) state of an object
(b) size of an object
(c) solubility of a substance
(d) all of these

4. Which of the following involves a fast chemical change?
(a) The growth of a plant
(b) The rusting of iron
(c) The ripening of a mango
(d) The burning of a matchstick

5. Which of the following is an example of non-periodic change?
(a) Floods
(b) Motion of a swing
(c) Movement of a pendulum
(d) Formation of day and night

6. The figures given below, show examples of
Fig. A Changes in chocolate state

Fig. B Changes in bulb due to electric current

(a) Both ‘A’ and lB’ are irreversible changes yA
(b) Both ‘A’ and ‘B’ are reversible changes
(c) A’ is irreversible but ‘FT is reversible change
(d) ‘A’ is reversible but4B’ is irreversible change

D. Fill in the Blanks:

1. Many materials expand on being ………………. .
2. On being heated, a gas expands …………… than a solid does.
3. Periodic changes occur after regular ……………… .
4. Breaking ice-cube into two pieces is a …………….. change.
5. Irreversible changes are ………………. in nature.

E. State True or False:

1. Every change has some cause. …………………….
2. Gases contract on cooling. ……………….
3. Cooking of rice is a physical change. ………………
4. Breaking of a China dish is a chemical change. …………….
5. Formation of clouds is a fast change. ………………

F. Match the following:

‘A’	‘B’
1. Rain on a hot day	a. Chemical change
2. Beating of human heart	b. Physical change
3. Formation of day and night	c. Desirable change
4. Rusting of iron	d. Periodic change
5. Melting of ice	e. Natural change

G. Some common changes are given in Table below. Which of these changes, do you think can be reversed?

Change	Can be reversed Yes/No
Raw egg to boiled egg
Batter to idli
Wet clothes to dry clothes
Woollen yarn to knitted sweater
Grain to its flour
Cold milk to hot milk
Straight string to coiled string
Bud to flower
Milk to paneer
Cow dung to biogas
Stretched rubber band to its normal size
Ice cream to molten ice cream

H. Observe preparation of disher at your home. Identify two changes that can be reversed.

Worksheets for Class 6 Science

Grade 6 Separation of Substances Worksheets

November 10, 2020November 10, 2020 by worksheetsbuddy_do87uk

A. Answer the following questions in short:

1. Why do we need to separate different components of a mixture ? Give two examples.
2. What is winnowing? Where is it used?
3. How will you separate husk or dirt particles from a given sample of pulses before cooking?
4. What is sieving? Where is it used?
5. How will you separate sand and water from their mixture?
6. Is it possible to separate sugar mixed with wheat flour? If yes, how will you do it?
7. How would you obtain clean water from a sample of muddy water?
8. Lemonade is prepared by mixing lemon juice and sugar in water. You wish to add ice to cool it. Should you add ice to the lemonade before or after dissolving sugar? In which case would it be possible to dissolve more sugar?
9. Why do we need water filters at our homes?
10. Why do our wet clothes dry faster during summer than winter?

B. Fill in the Blanks:

1. The method of separating seeds of paddy from its stalks is called …………… .
2. When milk, cooled after boiling, is poured onto a piece of cloth the cream (malai) is left behind on it. This process of separating cream from milk is an example of …………………. .
3. Salt is obtained from seawater by the process of ………………… .
4. Impurities settled at the bottom when muddy water was kept overnight in a bucket. The clean water was then poured off from the top. The process of separation used in this example is called …………….. .
5. Mist is a …………………………………… mixture.

C. State True or False:

1. A mixture of milk and water can be separated by filtration. ……………….
2. A mixture of powdered salt and sugar can be separated by the process of winnowing. ……………..
3. Separation of sugar from tea can be done with filtration. ………………
4. Grain and husk can be separated with the process of decantation. ………………
5. Winnowing is used to separate grain from stalks by hitting them against any hard surface. ……………..

D. Tick (✓) the Correct Option:

1. The method of separating seeds of paddy from their stalks is called:
(a) sieving
(b) winnowing
(c) threshing
(d) magnetic separation

2. ……………….. is used to separate a mixture of wheat and husk.
(a) Magnetic separation
(b) Threshing
(c) Winnowing
(d) Sieving

3. Which of the following is a homogeneous mixture?
(a) An oil-water mixture
(b) A sand-water
(c) Mist
(d) A nitrogen-oxygen mixture

4. Which of the following is a heterogeneous mixture?
(a) Air
(b) A fizzy drink
(c) A salt solution
(d) A salt-pepper mixture

5. Which of the following method is used to separate butter from curd?
(a) Evaporation
(b) Centrifugation
(c) Filtration
(d) Condensation

E. Classify the following under the correct category:

gold, copper sulphate, cold drinks, mango juice, water, sugar solution, pond water, common salt, air

Pure Substances	Mixtures

F. Match the following:

‘A’	‘B’
1. A chalk-water mixture	a. A gaseous mixture
2. A glucose solution	b. A solid-gas mixture
3. A fizzy drink	c. A homogeneous solid-liquid mixture
4. Smoke	d. A heterogeneous solid-liquid mixture
5. Air	e. A gas-liquid mixture

G. Observe the diagram(s) given below and name the process used:

H. In Column I of Table are given a few processes of separation. The purpose of separation and the way separated components are used is mentioned in Column II and III respectively. However, the information given in Columns II and III is jumbled up. Can you match each process with its purpose and the way separated components are used?

Worksheets for Class 6 Science

Grade 6 Sorting Materials Into Groups Worksheets

November 10, 2020November 10, 2020 by worksheetsbuddy_do87uk

A. Answer the following questions in short:

1. Name five objects which can be made from wood.
2. Select those objects from the following which shine:
Glass bowl, plastic toy, steel spoon, cotton shirt
3. Given below are the names of some objects and materials:
Water, basket ball, orange, sugar, globe, apple, papaya and earthen pitcher.
Group them as:

Round shaped and other shapes.
Eatables and non-eatables.

4. List all items known to you that float on water. Check and see if they will float on an oil or kerosene.
5. What do you mean by soluble substances?
6. How will you differentiate among solid, liquid and gas?
7. Mercury is used in thermometer though it is a metal. Why?
8. Do gases dissolve in water?

B. Match the objects given below with the materials from which they could be made. Remember, an object could be made from more than one material and a given material could be used for making many objects:

Objects	Materials
1. Book	a. Glass
2. Tumbler	b. Wood
3. Chair	c. Paper
4. Toy	d. Leather
5. Shoes	e. Plastics

C. State True or False:

1. Stone is transparent, while glass is opaque. ……………
2. A notebook has lustre while eraser does not. …………….
3. Chalk dissolves in water. …………………
4. A piece of wood floats on water. ………………..
5. Sugar does not dissolve in water. ………………
6. Oil mixes with water. ………………..
7. Sand settles down in water. ……………….
8. Vinegar dissolves in water. ……………….

D. Find the odd one out from the following:

1. Chair, Bed, Table, Baby, Cupboard ……………….
2. Rose, Jasmine, Boat, Marigold, Lotus ……………….
3. Aluminium, Iron, Copper, Silver, Sand ……………
4. Sugar, Salt, Sand, Copper sulphate …………….

E. Tick (✓) the Correct Option:

1. Which one is not matter?
(a) Electricity
(b) Paper
(c) Water
(d) Petroleum

2. Which of the following materials is lustrous?
(a) Wood
(b) Gold
(c) Paper
(d) Sulphur

3. ………………. is a translucent substance.
(a) Oily paper
(b) Water
(c) Sand paper
(d) Wood

4. Which of the following is not opaque?
(a) Wood
(b) Frosted glass
(c) Iron
(d) Cardboard

F. Fill in the Blanks:

1. A ………………………… material breaks easily.
2. A ………………………… material can be drawn into a wire.
3. Kerosene is …………………. while cotton is ………………. .
4. Stone is …………………. while cotton is …………….. .
5. Plastic is a …………….. material.
6. Coconut oil …………………….. on the surface of water.

G. During summer holidays, a group of children collect some materials and tried to group them on the basis of prop erties. Help them in filling the blanks given in the table.

H. Complete the Table given below:

I. Science Puzzle:
Across (→)
1. Coal is a ………………… material.
3. The particles of this state of matter have no force of attraction.
4. The way the surface of an object feels on touching it.
5. The ability of a substance to dissolve in another substance.

Down (→)
2. This state of matter has definite shape and volume.
6. It is the property of materials by which they allow light to pass through them.

J. You may have played a memory game with your Mends. Several objects are placed on a table, you are asked to observe them for a few minutes, go into another room and write down the names of all objects that you can remember. Play this game, with a difference! Ask all the participants in the game to remember objects with some particular property while playing this memory game—remember and write do\vn the names of objects that were made of wood or objects that are edible and so on. Have fun!

Worksheets for Class 6 Science

Grade 6 Fibre to Fabric Worksheets

November 10, 2020November 10, 2020 by worksheetsbuddy_do87uk

A. Classify the following fibres as natural or synthetic:

1. Nylon ……………
2. Wool …………….
3. Cotton …………..
4. Silk ………………
5. Polyester ………………
6. Jute ……………….

B. State True or False:

1. Yarn is made from fibres. …………………
2. Spinning is a process of making fibres. ………………
3. Jute is the outer covering of coconut. ……………..
4. The process of removing seeds from cotton is called ginning. ………………
5. Weaving of yarn makes a piece of fabric. ………………..
6. Silk fibre is obtained from the stem of a plant. ………………..
7. Polyester is a natural fibre. ………………..

C. Fill In The Blanks:

1. Plant fibres are obtained from ……………… and …………………. .
2. Animal fibres are ………………. and …………………. .
3. Jute requires ………………… soil for cultivation.
4. …………………. is used for making gunny bags.
5. Clothes made of synthetic fibres burn …………………….. .

D. Answer the following questions in short:

1. From which parts of the plant cotton and jute are obtained?
2. Name two items that are made from coconut fibre.
3. Explain the process of making yarn from fibre.
4. Distinguish between natural and synthetic fibres.
5. What do you understand by knitting?
6. Why are cotton clothes preferred in summer compared to synthetic clothes?

E. Tick (✓) the Correct Option:

1. A silkworm lives on leaves of ………………..
(a) mulberry plant
(b) mango plant
(c) palm plant
(d) strawberry plant

2. Which country is the birth place of silk?
(a) India
(b) China
(c) USA
(d) Australia

3. Which of the following is a synthetic fibre?
(a) Nylon
(b) Polyester
(c) Terelene
(d) All of these

4. Which of the following grows best in a black soil and warm climate?
(a) Cotton
(b) Flax
(c) Jute
(d) Coconut

5. The hand-operated machines used to weave cloth are called:
(a) mills
(b) powerlooms
(c) handlooms
(d) gins

F. Match the following:

‘A’	‘B’
1. Warp	a. Removal of gunny matter from the stem of a flax or jute plant by bacterial action in stagnant water.
2. Retting	b. The lengthwise yarn in the loom.
3. Ginning	c. The crosswise yarn in the loom.
4. Weft	d. Removal of seeds from cotton.

G. Name and explain the given process.

H. Science Puzzle:

There is a magic box. Find out the answer of given questions by moving your scale from left to right or up to down or diagonally.

1. Long, thin strands found in plants or animals ………………… .
2. The material made by arrangement of yarn …………….. .
3. Press and twisted bunch of fibres, larger and stronger ………………… .
4. Type of yarn used for stitching by hand ………………. .

I. India has been a major producer of cotton and its fabric. India exports cotton fabrics and items to many other countries. Find out, how it helps us.

J. DO you know that famous Sufi Saint and poet Kabir, was a weaver? Find out about his life and teachings.

Worksheets for Class 6 Science

Grade 6 Components of Food Worksheets

November 10, 2020November 10, 2020 by worksheetsbuddy_do87uk

A. Answer the following questions in short:

1. Name the major nutrients in our food.
2. Name the following:
(a) The nutrients which mainly give energy to our body.
(b) The nutrients that are needed for the growth and maintenance of our body.
(c) A vitamin required for maintaining good eyesight.
(d) A mineral that is required for keeping our bones healthy.
3. Name two foods each rich in:
(a) Fats ………………. ……………….
(b) Starch ……………. ……………….
(c) Dietary fibre ……………. ……………….
(d) Protein …………….. ………………..
4. What is a balanced diet? What should it contain?
5. Why should we include vitamins in our food?
6. What are deficiency diseases?
7. Why does eating of one type of food cause imbalance in nutrition?
8. Does animal food also consist of nutrients and do they need a balanced diet?

B. Tich (✓) the statements that are correct:

1. By eating rice alone, we can fulfil nutritional requirement of our body.
2. Deficiency diseases can be prevented by eating a balanced diet.
3. Balanced diet for the body should contain a variety of food items.
4. Meal alone is sufficient to provide all nutrients to the body.

C. Fill In The Blanks:

1. ……………… is caused by deficiency of Vitamin D.
2. Deficiency of ……………….. causes a disease known as beri-beri
3. Deficiency of vitamin C causes a disease known as ……………….. .
4. Night-blindness is caused due to deficiency of …………….. in Our food.
5. Our food contains several components known as ……………… .
6. Fats contain …………….. oxygen as compared to ……………….. .

D. Tick (✓) the Correct Option:

1. Vitamins are essential for the body to:
(a) supply energy
(b) make new cells
(c) protect it from diseases
(d) grow fast

2. Which one of the following constitutes balanced diet?
(a) Roti, rice, dal, vegetables, pickle
(b) Parantha, butter, curd, egg, fruits
(c) Rice, samber, idle, pickle, fruits
(d) Roti, dal, salad, vegetables

3. Goitre occurs due to the deficiency of :
(a) chlorine
(b) potassium
(c) iodine
(d) iron

4. Our hair and nails contain :
(a) calcium
(b) phosphorus
(c) fluorine
(d) proteins

5. Glucose and fructose are
(a) starches
(b) fats
(c) sugars
(d) none of these

E. Match the following:

‘A’	‘B’
1. Beri-Beri	a. Swelling in neck
2. Anaemia	b. Bending of bones
3. Marasmus	c. Stopping of growth
4. Goitre	d. Weak muscles
5. Scurvy	e. Weakness
6. Rickets	f. Bleeding gums

F. Define the following terms:

1. Nutrients:
2. Dietaiy fibres:
3. Minerals:

G. The following Table gives information about Vitamins and Minerals. Complete the Table:

Worksheets for Class 6 Science

Grade 6 Food Where Does It Come From Worksheets

November 10, 2020November 10, 2020 by worksheetsbuddy_do87uk

A. Answer the following questions in short:

1. Do you find that all living beings need the same kind of food?
2. Name five plants and their parts that we eat.
3. What are the main functions of food?
4. What are the main sources of food?
5. Does everyone around you get enough food to eat? If not, Why?
6. What are the ways we can think of the avoid was tage of food?

B. Match The Following:

Column A	Column B
1. Milk, curd, paneer, ghee	a. eat other animals
2. Spinach, cauliflower, carrot	b. eat plants and plant products
3. Lions and tigers	c. are vegetables
4. Herbivores	d. are all animal products

C. Fill In The Blanks With The Words Given:

herbivore, plant, milk, sugarcane, carnivore

1. Tiger is a …………. because it eats only meat.
2. Deer eats only plant products and so, is called ………….. .
3. Parrot eats only ……………. products.
4. The …………… that we drink, which comes from cows, buffaloes and goats is an animal product.
5. We get sugar from ………………… .

D. Tick (✓) the Correct Option:

1. Animals provide us with:
(a) meat
(b) milk
(c) eggs
(d) all of these

2. Radishes and carrots are:
(a) stems
(b) leaves
(c) flowers
(d) roots

3. Rice; roti, samber and vegetables are examples of:
(a) ingredients
(b) food
(c) animal products as food
(d) all of these

4. Which part of cabbage is used as food?
(a) Leaves
(b) Stems
(c) Roots
(d) Fruits

5. Vultures and crows are:
(a) Scavengers
(b) Carnivores
(c) Omnivores
(d) Herbivores

6. What are heterotrophs?
(a) Plants
(b) Animals
(c) Both animals & plants
(d) None of these

E. State True or False:

1. Potato and onion are modified stems which grow below the ground. …………….
2. Plants are also called consumers. ……………….
3. All green plants make their food in leaves. ……………..
4. Plants are herbivores. ………………..
5. Deer are scavengers. ……………….
6. Animals provide us milk, meat, and wool. …………………

F. State Fill in the blanks in the Table and add more examples to the list:

Ingredients use to prepare food items and their sources:

G. From all the food items you have listed in the Table under question G, choose those items whose ingredients are obtained from plants. Which part of a plant? Identify these and list the food items and plant parts as shown in the following table:

Plant parts as Food:

H. Several animals are listed in the following Table. F some of them, the type of food they eat is also given. Fill in the blanks in the Table:

Animals and their Food:

Name of the animal	Food the animal eats
Buffalo	Grass, oilcake, hay, grains
Cat	Small animals, birds, milk
Rat
Lion
Tiger
Spider
House lizard
Cow
Human beings
Butterfly
Crow
Others

I. Prepare a table and enter the animals of the group separately in the three columns, as shown:

J. Label the different parts of the plant given below in the figure:

K. Make a list (with pictures, when possible) of food items generally taken by people of different regions of India. Place these on a large outline map of India to display in your classroom.

Worksheets for Class 6 Science

Grade 8 Rational Numbers Worksheets

November 11, 2020November 10, 2020 by worksheetsbuddy_do87uk

Grade 8 Maths Rational Number Multiple Choice Questions (MCQs)

1. Associative property is not followed in ……………… .
(a) whole numbers
(b) integers
(c) natural numbers
(d) none of these

2. …………………… is the identity for the addition of rational numbers.
(a) 1
(b) 0
(c) -1
(d) $\frac{1}{2}$

3. ………………… is the multiplicative identity for rational numbers.
(a) 1
(b) 0
(c) -1
(d) $\frac{1}{2}$

4. The additive inverse of $\frac{7}{5}$ is:
(a) 1
(b) 0
(c) – $\frac{7}{5}$
(d) $\frac{7}{5}$

5. What number should be added to $\frac{7}{12}$ to get $\frac{4}{15}$ ?
(a) – $\frac{19}{60}$
(b) – $\frac{11}{30}$
(c) $\frac{51}{60}$
(d) $\frac{1}{20}$

6. What number should be subtracted from – $\frac{3}{5}$ to get -2?
(a) – $\frac{7}{5}$
(b) – $\frac{13}{5}$
(c) $\frac{13}{5}$
(d) $\frac{7}{5}$

7. Which of the rational numbers is the smallest?
(a) $\frac{-5}{16}$
(b) $\frac{-13}{24}$
(c) $\frac{3}{-4}$
(d) $\frac{7}{-12}$

8. Rational number $\frac{3}{40}$ is equal to:
(a) 0.75
(b) 0.12
(c) 0.012
(d) 0.075

9. A rational number between $\frac{3}{5}$ and $\frac{4}{5}$ is
(a) $\frac{7}{5}$
(b) $\frac{7}{10}$
(c) $\frac{3}{10}$
(d) $\frac{4}{10}$

10. Find x such that $\frac{3}{5}=\frac{x}{-25}$
(a) -5
(b) -15
(c) -15
(d) none of these

11. Find x such that $\frac{-48}{x}$ = 2
(a) 24
(b) -12
(c) -24
(d) none of these

12. Find x such that $\frac{-3}{8}$ and $\frac{x}{-24}$ are equivalent rational numbers.
(a) 3
(b) 9
(c) 8
(d) none of these

13. Find the value of $\frac{3}{-5} \times \frac{-5}{-3}$
(a) -1
(b) 0
(c) 1
(d) none of these

14. The equivalent rational number of $\frac{-6}{5}$ is
(a) $\frac{-3}{5}$
(b) $\frac{12}{10}$
(c) $\frac{-12}{10}$
(d) none of these

15. Fill in the boxes with the correct symbol: $\frac{5}{-11} \square \frac{-5}{11}$
(a) >
(b) <
(c) =
(d) none of these

16. Fill in the boxes with the correct symbol: $\frac{1}{-3} \square \frac{-1}{4}$
(a) >
(b) <
(c) =
(d) none of these

17. Rewrite the rational number $\frac{-18}{48}$ in the simplest form.
(a) $\frac{-9}{24}$
(b) $\frac{-3}{8}$
(c) $\frac{3}{8}$
(d) none of these

18. Rewrite the rational number $\frac{44}{-72}$ in the simplest form
(a) $\frac{22}{-36}$
(b) $\frac{11}{-18}$
(c) $\frac{11}{18}$
(d) none of these

19. Write the next rational number in the pattern:
(a) $\frac{12}{25}$
(b) $\frac{15}{25}$
(c) $\frac{-15}{25}$
(d) none of these

20. Write the next rational number in the pattern:
(a) $\frac{-5}{-30}$
(b) $\frac{5}{-30}$
(c) $\frac{4}{-30}$
(d) none of these

Class 8 Maths Rational Number Fill In The Blanks

1. Zero has ………………… reciprocal.
2. The numbers ……………….. and ……………….. are their own reciprocals.
3. The reciprocal of -5 is …………………… .
4. Reciprocal of $\frac{1}{x}$ , where x ≠ 0 is ………………. .
5. The product of two rational number is always a ……………. .
6. The reciprocal of a positive rational number is ……………… .
7. The additive inverse of $\frac{-a}{b}$ is ………………… .
8. Reciprocal of $\frac{-3}{4}$ is ……………… .
9. The reciprocal of a negative rational number is ……………… rational number.
10. The rational number ……………… is equal to its negative.

Class 8 Maths Rational Number Very Short Answer Type Questions

1. What is the additive inverse of $\frac{-7}{11}$ ?
2. What is the multiplicative inverse of $2 \frac{3}{11} \times \frac{1}{3}$ ?
3. Which number lies between $\frac{1}{5}$ and $\frac{1}{4}$ ?
4. Find the product of $\frac{3}{8}$ and the reciprocal of $\frac{-5}{17}$ .
5. A tailor needs $\left(\frac{9}{10}\right)^{t h}$ of a metre of cloth to stitch a blouse. It he wants to stitch 100 blouses how much cloth will be needed?
6. The sum of the additive inverse and multiplicative inverse of 3 is ………………. .

Class 8 Maths Rational Number Short Answer Type Questions

1. The number which is subtracted from $\frac{29}{13}$ to get $\frac{-5}{7}$ is ………………. .
2. The value of x for which the two rational numbers $\frac{4}{9}$ , $\frac{x}{54}$ are equivalent.
3. $\frac{5}{6}$ of all the money in Salma’s bank account is ₹ 55,000. How much money does Salma have in her bank account?
4. Arrange the number $\frac{1}{4}$ , $\frac{13}{16}$ and $\frac{5}{8}$ in the ascending order.

Class 8 Maths Rational Number Long Answer Type Questions

1. Simplify:

2. The cost of 3 $\frac{1}{2}$ kg of wheat is ₹ 63. How much will 1 $\frac{1}{4}$ kg of wheat cost?
3. Season tickets usually cost ₹ 120 $\frac{4}{5}$ per person. For students, they are priced at $\frac{1}{4}$ of the normal cost. How much will 6 tickets will cost for students?

Worksheets for Class 8 Maths

Grade 8 Reaching the Age of Adolescence Worksheets

November 11, 2020November 10, 2020 by worksheetsbuddy_do87uk

A. Answer the following questions in short:

1. What is the term used for secretions of endocrine glands responsible for changes taking place in the body?
2. Define adolescence.
3. What is menstruation? Explain.
4. List changes in the body that take place at puberty.
5. Prepare a table having two columns depicting names of endocrine glands and hormones secreted by them.
Answer:

6. What are sex hormones? Why are they named so? State their function.
7. Write notes on:
(a) Adam’s apple.
(b) Secondary sexual characters.
(c) Sex determination in the unborn baby.
8. The table given on next page’ shows the data on likely heights of boys and girls as they grow in age. Draw graphs showing height and age for both boys and girls on the same graph paper. What conclusions can be drawn from these graphs?

9. Name four body processes that hormones control.
10. We should avoid taking medicines/drugs unless prescribed by a doctor. Give reasons.
11. Our government has legalised the age for marriage in boys and girls. Give reasons as to why one should get married after a certain age.

B. Tick (✓) the correct option:

1. Adolescents should be careful about what they eat, because:
(a) proper diet develops their brains
(b) proper diet is needed for the rapid growth taking place in their body
(c) adolescents feel hungry all the time
(d) taste buds are well developed in teenagers

2. Reproductive age in women starts when their:
(a) menstruation starts
(b) breasts start developing
(c) body weight increases
(d) height increases

3. The right meal for adolescents consists of:
(a) chips, noodles, coke
(b) chapati, dal, vegetables
(c) rice, noodles and burger
(d) vegetable cutlets, chips and lemon drink

4. Which of the processes in the body is controlled by hormones?
(a) Blood circulation
(b) Growth
(c) Digestion
(d) Excretion

C. Fill in the blanks:

1. The glands of the ……………….. system secrete hormones.
2. In males, the hormone ……………. controls sexual characteristics.
3. The larynx is bigger in ………………… .
4. Ovulation is the production of an …………….. by one of the ……………. .

D. State True or False:

1. Glands release hormones into the blood stream through ducts. ……………..
2. Hormones act wherever they are released by the glands. ……………..
3. Adolescence is marked by the onset of puberty. ……………
4. The unfertilised egg is called foetus. ………………

E. Match the following:

‘A’	‘B’
1. Hormones are secreted by	a. Males
2. Legal age for marriage of boys in India is	b. Larynx
3. Voice box is also called	c. Females
4. Ovary is found in	d. 21 years
5. Testis are found in	e. Endocrine glands

F. Collect newspaper cuttings and information in magazines about HIV/AIDS. Write a one page article of 15 to 20 sentences on HIV/ AIDS.

G. Endocrine glands are given below. Write hormones secretion and its function:

H. Word game: Use the clues to work out the words:

Across (→)
3. Protruding voice box in boys
4. Glands without ducts
7. Endocrine gland attached to brain
8. Secretion of endocrine glands
9. Pancreatic hormone
10. Female hormone

Down (↓)
1. Male hormone
2. Secretes thyroxine
3. Another term for teenage
5. Hormone reaches here through blood stream
6. Voice box
7. Term for changes at adolescence

Worksheets for Class 8 Science

Grade 8 Force and Pressure Worksheets

November 11, 2020November 10, 2020 by worksheetsbuddy_do87uk

A. Answer the following questions in short:

1. Give two examples each of situations in which you push or pull to change the state of motion of objects.
2. Give two examples of situations in which applied force causes a change in the shape of an object.
3. An archer stretches her bow while taking aim at the target. She then releases the arrow, which begins to move towards the target. Based on this information fill up the gaps in the following statements using the following terms:
muscular, contact, non-contact, gravity, friction, shape, attraction.
(a) To stretch the bow, the archer applies a force that causes a change in its ……………… .
(b) The force applied by the archer to stretch the bow is an example of ……………… force.
(c) The type of force responsible for a change in the state of motion of the arrow is an example of a ………….. force.
(d) While the arrow moves towards its target, the forces acting on it are due to …………… and that due to ………………………. of air.
4. In the following situations identify the agent exerting the force and the object on which it acts. State the effect of the force in each case:
(a) Squeezing a piece of lemon between the fingers to extract its juice.
(b) Taking out paste from a toothpaste tube.
(c) A load suspended from a spring while its other end is on a hook fixed to a wall.
(d) An athlete making a high jump to clear the bar at a certain height.
5. A blacksmith hammers a hot piece of iron while making a tool. How does the force due to hammering affect the piece of iron?
6. An inflated balloon was pressed against a wall after it has been rubbed with a piece of synthetic cloth. It was found that the balloon sticks to the wall. What force might be responsible for the attraction between the balloon and the wall?
7. Name the forces acting on a plastic bucket containing water held above ground level in your hand. Discuss why the forces acting on the bucket do not bring a change in its state of motion.
8. A rocket has been fired upwards to launch a satellite in its orbit. Name the two forces acting on the rocket immediately after leaving the launching pad.
9. Define force.
10. What are the two factors on which pressure in liquid depends?
11. It is difficult to cut cloth using a pair of scissors with blunt blades. Explain.
12. When you drink a soft drink with the help of a straw pipe, what forces the liquid up through the straw?

B. Fill in the blanks:

1. To draw water from a well we have to …………………. at the rope.
2. A charged body ………………….. an uncharged body towards it.
3. To move a loaded trolley we have to ………………….. it.
4. The north pole of a magnet ……………………. the north pole of another magnet.

C. Tick (✓) the correct option:

1. When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is due to:
(a) pressure of water
(b) gravity of the earth
(c) shape of rubber bulb
(d) atmospheric pressure

2. Which of these is a contact force?
(a) Friction
(b) Magnetic force
(c) Gravitational force
(d) Electrostatic force

3. The SI unit of pressure is:
(a) kg/m³
(b) kg/m²
(c) Pascal
(d) Newton

4. Which force is exerted by all matter on all other matter?
(a) Gravitational force
(b) Magnetic force
(c) Electrostatic force
(d) Frictional force

D. State True or False:

1. Gravity is a contact force. ……………..
2. Force is energy. ……………
3. Force always has a particular direction. ………………
4. Friction is always harmful. ………………

E. Match the following:

‘A’	‘B’
1. Lifting the school bag	a. Non-contact force
2. Pushing the drawer of a table	b. Electrostatic force
3. Fruit falls on the ground.	c. Contact force
4. Sticking of bits of a dry paper on a comb	d. Muscular force
5. Magnetic force	e. Gravitational force

F. Complete the following table:

Identifying Actions as Push or Pull:

G. Read the table carefully and tick (✓) in the right column:

Studying the Effect of Force on Objects: