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Friday 26 November 2021

VII SCIENCE REFRESHER COURSE ANSWER

VII SCIENCE 

REFRESHER COURSE ANSWER

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FORCE AND MOTION 

I. Choose the correct Answer

1. m/s

2. west to east

3. periodic motion

II. Complete the Analogy

4. non contact force

5. Swinging of pendulum

6. metre/second

III. Fill ups

7. Non contact force

8. Linear

9. Non uniform

10. Rotatory

IV write True of False

11. False

12. True

13. False

14. True

V.Match the following

15. The tip of hands of a clock                         - circular motion 

16. The motion of train                                     - uniform motion

17. Flapping of a flag in wind                           - non periodic motion

18. Movement of needle in a sewing machine - periodic motion

19. Movement of the wheel                              - rotatory motion

20. swinging of a pendulum                              - oscillatory motion

 

Electricity

I Choose the correct Answer

1. Battery

2. Eel

3. Silver

4. Parallel

5. Laptop

II Fill ups

6. Conductor

7. Electric source

8. Key

9. Thomas Alwa Edison

10. Muppandal

III. True of False

11. False

12. False

13. True

IV Odd one out

14. Electricity

15. Needle

V. Match the following

16. Bulb does not glow

17. cell

18. open key

19. battery


MEASUREMENT

 

I. Choose the correct Answer

1. M

2. Measurement

3. 5000m

4. Litre

5. French

II. Fill ups

6. 2 metre

7. one sixth of

8. 100 centimetre

9. Physical Quantity

10. Liquid displacement method

III. True or False

11. True

12. False

13. False

14. True

15. True

IV. Match the following

16. Temperature

17. Distance

18. Current

19. Amount of Substance

20. Intensity of Light


HEAT

I. Choose the correct Answer

1. 370c

2. Ice

3. Heat energy

II. Fill ups

6. Heat

7. Temperature

8. Heat

9. Sun

10. Heat

III. True or False

11. False

12. False

13. False

14. True

15. True

IV. Match the following

16. Joule

17. kelvin

18. No thermal conduct

19. 00c

20. 1000c


MATTER AROUND US

I. True or False

1. True

2. False

3. True

4. False

5. True

II. Match the Following

6. Evaporation

7. Winnowing

8. Magnetic Separation

9. Filtration

10. Churning

III. Fill in the Blanks

11. 24 karat goled

12. mixture

13. centripetal force

14. sieving

15. mixture

IV. Choose the correct Answer

16. Rubber band

17. Moisture

18. Sieving

19. Liquids

20. Needle

 

CHEMISTRY IN EVERYDAY LIFE 

I. Choose the correct Answer

1. Sodium hydroxide

2. Vermi compost

3. Starch

4. Gypsum

5. Chemical change

II. Fill in the Blanks

6. Earth worm

7. syn propanethial s oxide

8. Fermentation

9. Urea/Ammonium Nitrate

10. Exothermic process/Hydration

III. Find the odd one out

11. Gypsum

12. Urea

13. Starch

14. Clay

15. Urea

IV. Match the following

16. Plant Growth

17. Bone fracture

18. Disinfectant

19. Cement

20. Natural indicator


CHANGES AROUND US 

I. Choose the correct Answer

1. Slow change

2. Chemical change

3. Formation of curd from milk

4. Physical change

5. Ripening of fruit

II. Fill in the Blanks

1. Fast

2. Reversible

3. Undesirable

4. Construction of buildings

5. Natural change

III. Match the following

1. Fast change

2. Irreversible change

3. Slow change

4. Chemical change

5. Natural changes

IV. Analogy

1. Irreversible

2. Desirable change

3. Irreversible change

4. Slow change

5. Freezing


THE WORLD OF PLANT

 

I. Fill in the Blanks

1. 70

2. desert

3. root

4. leaves

5. dicotyledons

II. Choose the correct Answer

1. Fresh water

2. Traspiration

3. Root

4. Aquatic

5. Mountain

III. state True or False

1. False

2. True

3. False

4. False

5. True

IV. Match the Following

1. Himalayas

2. Dry places

3. Branches

4. Leaves

5. Monocot plants

HEALTH AND HYGIENE

I. Choose the correct Answer

1. Protein

2. Vit C

3. Minerals

4. they are rich in minerals and vitamins

5. prokaryotic

II. Fill in the Blanks

1. deficiency

2. goiter

3. rickets

4. food

5. virus

III. Match the Following

1. Night blindness

2. Beri Beri

3. Scurvy

4. Rickets

5. Sterility

IV. Complete the Diagram (Nutrients)

1. protein

2. carbohydrate

3. cholesterol

4. water

5. minerals

6. vitamin

THE WORLD OF ANIMALS

1. Find the animal below

            c. Frog

2. Examine the given image

            a. what bird is this?

Duck

            b. what can we compare this to

                     boat paddle

3. The gills are used as a respiratory organ

4. Penguin

5. Frog

6. Desert-Penguin

7. Migration

8. Kangaroo rat

9. I calculate my age by counting year, month and days. The age of fish can be calculated by counting the number of annuli or year marks

10. Arthropods insect. It belongs to insect species

11. Amoeba, paramecium, flagellam, Euglena

12. Fish, Snake, Bird

13. The fish respire with the help of gills. The structure of gills that helps fish respire inside water. It cannot breathe through the atmospheric oxygen and hence the fishes die when taken out of the water

14. correct

15. Birds

16. Egg is single celled

17. Paramecium, Amoeba, Euclena

18. Multi cellular Organisms

            a. Monkeys

            b. Human

            c. Plants

            d. Cats

HUMAN ORGAN SYSTEM

1. X ray

2. nervous system

3. 3-c

4. 4-b

5. cornea

6. Sternum

7. Protection of internal organs

8. Skull

9. Eyes

10. All the above

11. Tongue

12. It causes indigestion, burb, stomach irritation, chest irritation

13. c

14. Urea

15. b

16. Skeletal muscles

17. Choking is caused when a piece of food or other object gets stuck/block in the upper airway

18. Heart beat rate is 80-85

19. Vitamin D

20. Fill in the Blanks

            a. Eye

            b. Ear

            c. Skin

            d. Mouth

            e. Nose

THE CELL

I. Choose the correct Answer

1. Spirogyra

2. Micrometer

3. Nucleus

4. Prokaryotic cell

5. Nerve cell

II. Fill in the Blanks

1. Microscope

2. plasma membrane

3. Nucleus

4. 0.1

5. Chlorophyll

III. Write yes or No

1. Yes

2. Yes

3. Yes

4. Yes

5. Yes

IV. Match the following

1. Nucleus

2. Chloroplasts

3. Nuclear membrane

4. Cell Membrane

5. Mitochondrias

 

 

PLANTS IN DAILY LIFE

I. Choose the correct Answer

1. Bacillis

2. Rose mullai and jasmine

3. Banana tree

4. Silk worm

II. Fill in the Blanks

5. Herbal

6. Tuber

7. Jute

8. Cardamom

III. Match the following

9. Flower bud

10. Fruit

11. Seed

12. Bark

IV. Who am I

13. Black pepper

14. Neem

V. Find the Odd one out

15. Karpooravalli

16. Amla

VI. True or False

17. True

18. False

VII. Analogy

19. Nut

20. Stem


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