Which of these is NOT a source of surface water?

Windmills are used to:

When the Earth is seen from outer space, it looks mainly blue. This is because most of the Earth is covered with:

When sunlight passes through water droplets, a _________ is formed in the sky.

Clouds are made up of:

Which of these activities does NOT need wind?

Which colour is NOT found in the rainbow?

The wind pushes the water in the ocean and causes:

Look at this picture given below. It is due to:

If a steel plate is held on top of the hot vessel, we see tiny droplets of water on the plate. Which of these on touching the hot plate changes into droplets of water?