When we go on a busy road, feel uneasy even when we close nose with a napkin.
Why these symptoms we observe?

When we go on a busy road, feel uneasy even when we close nose with a napkin. If these symptoms will continue, what happens?

When we go on a busy road in the evening a lot of smoke is spread in the surroundings. We get cough and feel uneasy even when we close the nose with napkins. Why this type of symptoms we observe? Think about it. If these symptoms will continue, what happens?

Do we need energy when we sleep ? Why/why not ?

What does food give us? Why is it necessary when we sleep?

We cannot move ____when we open our mouth.

When we say sound travels in a medium

How does ionisation energy change when we go down in a group ?

Why do bubbles appear in water when we heat it ?