Why do you think old homes with high ceilings had ventilators?

All natural disasters can cause large-scale destruction of lives and property. Do you think new technological advances have helped a lot in predicting and protecting from such disasters and also in controlling damage?

Solve the password puzzle using the clues given below:

Across:

3. After heating, the density of the air _____.

6. A naturally occurring phenomenon that causes damage and destruction.

8. Storms in which strong winds are accompanied by heavy rainfall, thunder, and lightning.

Down:

1. Air moving in a flow and in a particular direction is called _____.

2. Movement of the cyclone winds become stronger and is called _____.

4. During this phenomenon winds blow at a high speed of around $300 \mathrm{km}/\mathrm{h}$.

5. Loud and booming sound produced during lightning.

7. A blanket of air that surrounds the Earth.