Tag: science & technology

There are more than 20 millions bacteria present on each sqaure inch of man's skin.

What invisible force holds you onto the earth, so that you don't simply fall off.

There is a special force which stops things moving or which slows down moving things. What is this force called?

Name the planet closest to the sun.

Solar energy is energy from what?

What do we call the speed which is faster than the speed of sound?

What is the loudest animal in the world?

Many animals use sound to find things. What is this system called?

The amount of water vapour in the air is called...?

Name the first instrument invented for recording and playing back sound.