Essential for Life - Air & Water Worksheet-10

Essential for Life - Air & Water Worksheet-10

 

  1. True/False

a.      The presence of nitrogen in the air helps in controlling the fire.

b.      Stratosphere is the second layer (from the top) of the earth.

c.      Atmosphere protects us from meteoroids.

d.      Evaporation and distillation methods are used to separate insoluble impurities.

e.      Boiling is the simplest method of purifying the water.

f.       Distilled water does not contain mineral so it is used in laboratories for experiments.

g.      Sugar is soluble in water.

h.      Tea gets dissolved in milk.

 

  1. Match the column.

 

Fill in the blanks:

  1. The blanket of air around the Earth’s surface is known as ____.

 

  1. The process in which alum is used to improve the rate of sedimentation is known as ___.

 

Answer Key:

(11)   a. True

b. False

c. True

d. False

e. True

f. True

g. True

h. False

(12)  1-f; 2-e; 3-a; 4-c; 5-b; 6-d

(13)  Atmosphere

(14)  loading