Air and Water (SCIENCE)

Which is the lowermost layer of atmosphere

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

How much km does stratosphere extend for?

• 20

• 30

• 25

• 85

In which layer of the atmosphere is the ozone layer situated

• Troposphere

• Stratosphere

• Mesosphere

• Exosphere

Which is the last layer of the atmosphere?

• Thermosphere

• Mesosphere

• Stratosphere

• Exosphere

What is the measurement of the longest layer of the atmosphere?

• 25 km

• 60 km

• 705 km

• 605 km

Wich of the following gases are present most in the atmosphere?

• Nitrogen

• Oxygen

What is the method used to remove salt from water?

• Filtration

• Sedimentation

• Decantation

• Evaporation

What does the picture show?

• Air pressure
  

• Water presure

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

• Condensation

• Evaporation

• Destillation

• Sedimentation

Can insoluble impurities be removed by sedimantation?

• YES

• NO