Gulf Indian High School, Dubai FORMATIVE ASSESSMENT 3, 2016 – 2017

Revision work sheet-Science-Grade 4

Multiple Choice Questions

1.Which of these is used to make khadi ?a. Jute b. silk c. cotton d . coir

2.Sara went to a cloth shop. There she found a fabric which was smooth to touch, had vibrant color and shine. The fabric could be

a.a.Cotton b. jute c. wool d. silk 3.Identify the fabric that is used to make sacks, carpet and ropes

a. cotton b. jute c. linen d. silk

4.You must NOT wear synthetic fibres while working near fire because___ a.They make you feel cold and so you may get a frost bite b. They are lustrous and so they shine under the flame c. They melt on heating and stick to your body when they catch fire d. None of the above5.Which of the following is a method to purify water in a swimming pool ?

a. Sedimentation b. Decantation c. Chlorination d. Filtration 6.

It is winter, and the students of class 4 would like to choose a dry, sunny day for their picnic. Today is Sunday, and the newspaper has this 5-day weather forecast.Day SUN MON TUE WED THUFORECAST Sunn

yRainy

Foggy

 Sunny

Windy

MAXMIN

26 C16 C

24 C16 C

24 C10 C

30 C19 C

32 C17 C

Which of these days would be the best for the picnic?a. Monday b. Tuesday c. Wednesday d. Thursday

7.Which of these is not a synthetic fibre ? a.Lycra b. silk c. nylon d . polyster

8.Which answer best describes why wet clothes hung on a cloth line will dry ?a. water freezes on the clothesb. water melts from the clothesc.water condenses on the clothesd. water evaporates from the clothes

9.To keep insects away , these are kept between the folds of woollen clothes a. Mothballs b. sand c. perfume d. toffees

10.The data table below shows some average monthly air temperatures for a city in New York state . The average air temperature for the month of April is not shown .

Based on the data what would have been the average air temperature for the month of April ? 28° F b. 34°F c. 46°F d. 60°F11. Eventhough it was not raining at night ,today morning Minu was surprised to see water drops on leaves in his garden.What is the reason for it?

a) water vapour in the atmosphere condensed on dust particles.b) water evaporated from the river.c) At night transpiration took place.d).Sometimes water vapour in the atmosphere condenses on cold objects

12._______________ is not a natural fibre.

a) Linen b) cotton c) rayon d) silk

13.Manu’s mother gave a white cotton shirt to him, when he was going to market because

a).White colour absorbs light. b) white colour reflects light c) white clothes improves his personality d) only white coloured dress can absorb sweat.

14. Geethu went out to buy naphthalene balls from the market to keep her woolen clothes in a suitcase as it helps to

kill the germs b) keep the clothes shiny c) retain the colour d) keep the insects away.

15. Among the following which is not the result of condensation.

a).fog b) humidity c) contraction of air d) both b and c

16.Manu wants to know the reason why, we do not use woollen clothes in summer season, eventhough it absorb sweat.Find out the right answer.

a) Woollen clothes become heavy and uncomfortable when it absorb sweat.

b) It does not absorb heat.c) It does not allow body heat to escaped) d).Both a and c

17.Which of the following statement is not right.?

a) Linen we get from flax plant.b) Cotton is not a good absorbent.c) Natural clothes are expensive.

Nylon clothes catch fire easily.

18.Among the following which is the result of evaporation.

Snow b) humidity c) sea breeze d) fog.Short answer Questions for 2 marks

1.Define sedimentation.

2.Anju wanted to know the reason why sea breezes occur only during day time.can you explain the reason?3.Why do we need clothes?4.Four process in the water cycle are labelled below

Complete the chart by filling in the word for each processWhat happens during the process

Name the process

Water falls from the cloud to the ground Liquid water falls over earth’s surface Liquid water changes into water vapourWater vapour changes into liquid water

2.Observe the tools carefully . In which method of water purification these tools are used . Explain the method in your own words .

3.Why jute bags and cotton bags are encouraged these days ? 4.Will you wear a light colored fabric or dark colored one on a sunny day .Why?

5.Ajay wanted to fly in a hot air balloon . Can you explain the principle

behind the working of a hot air balloon ? Short Answer Questions-3 marks --Type II

1. How can you take care of your clothes ? Write any 3 ways. 2. Salman visited his grandparents who are staying in a

village . They use to draw water from the well. Salman noticed insoluble impurities in the water. Which method he might have used to remove those impurities ? Explain in your own words

3.Paul and John are students of grade 4. When they went for a field trip in the month of June in Dubai , Paul wore cotton shirt while John wore polyster T- shirt. One of these students made a wise choice on their attire

a. Who made a wise choice ?b. Why did Paul choose cotton shirt ?c. What is the difference between cotton and polyster fabric ?

4.Draw and explain sea breeze5.The picture below shows a tornado .A tornado brings high wind and heavy rain.

Describe any 3 ways by which the tornado affect the people living in that area.6.Draw and define any two methods of water purification methods.7.What are the advantages of synthetic clothes? 8.Observe the given picture and answer the following questions:

a.When the water is cool, why is the land warm?b.Why do you observe the air above the land moving upwards?c.What does the arrow pointing downwards show?

9.Explain the way snow is different from hail.10.Differentiate synthetic clothes and natural clothes.11.During summer vacation Anu went to both the places shown in the pictures

a) b)

i).Which area did she find humid? Give a scientific reason.

ii).She felt sticky in the humid area. Why?