Exploring Substances: Acidic, Basic, and Neutral — Science STD 7 — Question

You may have noticed that a few sharp jerks are given to clinical thermometer before using it. Why is it done so?

Name the tissues of a plant which carries,

1. Water and minerals from roots to the leaves.
2. Food from the leaves to the other parts of the plant.

Explain why there is no waste in a forest?

Explain why An antacid tablet is taken when you suffer from acidity.

What do you mean by vegetative propagation? Explain with example.

Shalu told her friend, “Adolescence brings only physical changes, like growing taller or developing body hair. ” Is she correct? What would you change in this description of adolescence?

Distinguish between the following. Unisexual flower and Bisexual flower.

The micro-organisms called decomposers play an important role in the forest. Discuss.

Why do plants store food as starch instead of glucose?

List two reasons that can cause floods.