Physical and Chemical Changes — Science STD 7 — Question

Name the finger like projection present in the inner wall of the small intestine.

Discuss why wearing more layers of clothing during winter keeps us warmer than wearing just one thick piece of clothing.

As we know that an image is formed by the actual intersection of rays and can be obtained on the screen. So, state whether it is real or virtual image.

What direction does the Sun appear to move in the sky?

What is a mould?

What type of change is called in which new substance with new properties is formed?

If litmus is not available, are there some other natural substances that can serve as acid- base indicators?

If you did not have a clock, how would you decide what time of the day is?

Choose the statement which is not correct in the case of an electric fuse.

A shopkeeper wanted to fix a mirror which will give a maximum view of his shop. What type of mirror should he use? Give reason.