Take a sponge. Observe its shape.Can you compress it? Is it a solid? Why? Think. Is anything coming out from the sponge when it is compressed.

Can you compress it ? Is it a solid ? Why ? (Think and Discuss)

Liquids and gases can be compressed , but it is difficult to compress solids.Why ?

Why can't you able to compress a wooden block?

What physical feature pertaining to the organism and its medium do you notice in a sponge body form which sponges can be/were identified as animals and not plants ? What do you call the region in the sponge body in which you noticed that feature ?

Can you say that salt is a liquid on the basis of change in its shape? Justify your answer. Take a sponge. Observe its shape.

Observe a lawn in your area (If you have one) and see how it is maintained. Find out from the gardener the different types of plants that he removes from time to time. Do you think a farmer does the same thing on his farm ?