​Air and Water

Which property of air does this image represent?

What is the percentage of Oxygen in air?

The layer of atmosphere in which space shuttles orbit is called ______________.

State whether True or False: “Filtration is a method of removing insoluble impurities.”

In which layer of the atmosphere is the ozone layer situated?

Which is not a way in which air pressure helps us?

Smog is a mixture of smoke and fog.

We do not sweat when it is humid.

The method of changing a liquid into its vapours and then condensing the vapours to get the pure form of that liquid is called ________________.

What is an essential nutrient for plants?

______________ percentage of the earth’s surface is covered in water.

In this layer of the atmosphere, meteoroids slow down and burn up.

After sedimentation, the action of pouring clear water out into another container is called distillation.

Neha presses the tip of a medicinal dropper and inserts it in the medicine bottle and then releases the tip of the dropper. She sees medicine rise up inside the tube of the dropper. Choose the correct reason for this.

Name the disease that affects the skin when it is exposed to ultraviolet rays.

The air is very thin in this layer of atmosphere.

Water is used as a coolant in vehicles.

Which gas is used in controlling fires?

What is the percentage of nitrogen in the air?

Which is the layer of atmosphere that extends from 500 km to outer space?