A. Choose the correct option .
1.___________ is the process of cleaning silk and woollen clothes with the use of petrol. (Detergent /Dry cleaning)
2. The path used by pedestrians to cross the road. _____________ (Zebra crossing /Traffic signal)
3. The water present below the surface of the earth is called _____. (waterworks /groundwater)
4. Never eat or drink any ______________ unless doctors prescribe them. (medicine / juice)
B. Give one word for each of the following sentences.
1. These fibres are made from the things dug out from the earth.
2. A device that removes small insoluble particles from liquid.
3. The special substances added to kill germs in the water.
4. A single piece of cloth worn by the factory workers who work with machines.
5. Eating this kind of food can cause food poisoning.
C. Define the following terms.
1. Evaporation
2. First-Aid
D. Answer the following questions.
1. What will you do to help a person who has a small cut on his / her hand?
2. Why do we wear woollen clothes in winter?
E. Differentiate between sea breeze and land breeze.
F. Justify the following statements.
1. Soldiers wear special uniforms made of tough fibres.
2. Do not run on the staircase.
3. Sometimes airports have to be closed down in winter season.
G. Look at the pictures and answer the questions given below.
1.
a. Identify the fibre of the cloth worn by Susan on a hot summer day.
b. Is the fibre obtained from plant or animal?
2.
c. Name the process involved in the formation of water droplets on the lid.
d. Give an example of this process in water cycle.
Please click on below link to download CBSE Class 4 Science Worksheet Set K