air and water class 5

What is the layer of air that surrounds the earth called?

• Atmosphere

• Hydrogen

• Ozone

• Helium

Is it true that there are five layers: troposphere, stratosphere, mesophere, thermosphere, and exosphere?

• True

• False

Which layer of the atmosphere contains the ozone layer?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

which layer of atmosphere absorbs harmful ultraviolet [uv] rays of sun

• ozone layer

• stratosphere

• troposphere

• atmosphere

the fourth layer is

ionosphere is a part of

• thermosphere

• exosphere

• thermsphere

• statosphere

the percentage of oxygen

there are two methods of separating soluble impurities and they are

which water is used in injections ,medicines ,car batteries,

water can be purified by 2 methods they are