Essential for Life - Air & Water Worksheet-7
Which of the following gas is essential for the survival of living things?
(A) Carbon dioxide (B) Nitrogen (C) Oxygen
Which of the following is the topmost layer of the Earth’s atmosphere?
(A) Exosphere (B) Mesosphere (C) Stratosphere
Which of the following statement is incorrect for air?
(A) Air occupies space (B) Air has mass
(C) Air has definite shape
Impurities that do not get dissolved in water are known as:
(A) Insoluble impurities (B) Soluble impurities
(C) None of these
After dissolving some sugar in water, Maya placed the solution under Sunlight for some days and she found only the crystals of sugar and no water. Which of the following process best describes the experiment?
(A) Sedimentation (B) Evaporation (C) Condensation
The given picture best describes the process of:
(A) Sedimentation (B) Decantation
Nita went to shopping for the whole day. She observed rashes on her skin after coming back from the market. Which of the following might have caused that?
(A) Sunburns (B) Allergy (C) None of these
Air tubes float on water due to:
(A) Frictional force (B) Gravitational force
(C) Air pressure
Difference in _________helps the aeroplane to land and take off from the ground.
(A) Electrostatic force (B) Air pressure
(C) Force of friction
Multiple Choice Questions (with more than one option):
Mark the different layers of Earth’s atmosphere.
(A) Mesosphere (B) Core (C) Mantle
(D) Thermosphere (E) Crust
(1)-(C); (2)-(A); (3)-(C); (4)-(A); (5)-(B); (6)-(A); (7)-(C); (8)-(C); (9)-(B); (10)-(A,D)