Secondary School (English Medium) (5 to 8) कक्षा ८ - CBSE Question Bank Solutions for Science

Give two examples of situations in which applied force causes a change in the shape of an object.

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.

To stretch the bow, the archer applies a force that causes a change in its ______.

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 gap in the following statement using the following terms.

The force applied by the archer to stretch the bow is an example of ______ force.

You spill a bucket of soapy water on a marble floor accidentally. Would it make it easier or more difficult for you to walk on the floor? Why?

Explain why objects moving in fluids must have special shapes.

Lightning conductors cannot protect a building from lightning.

Suggest three measures to protect ourselves from lightning.

The weather department has predicted that a thunderstorm is likely to occur on a certain day. Suppose you have to go out on that day. Would you carry an umbrella? Explain.

Fill in the blanks:

Asteroids are found between the orbits of ________ __ and _________.

Mark the following statement as true (T) or false (F).

INSAT is an artificial satellite. ( )

Explain why the following is made of thermosetting plastics?

Electric plugs/switches/plug boards

Which of the following is not true for fertilisers?

The process of loosening and turning of soil is called ______.

Pick out the odd one from the words given below and give a reason for it.

If you are given a dry piece of land for cultivation, what will you do before sowing the seeds?

State whether the following statement is True or False. Correct the false statement.

Using good quality seed is the only criterion to get high yield

State whether the following statement is True or False. Correct the false statement.

Cells of root nodules of leguminous plants fix nitrogen

During which months do farmers grow mustard in India?

1. Name the tool used with a tractor for sowing seeds in a field.
2. What are the advantages of using this tool?

The gas released during the preparation of bread is ______.