CLASS 4 Subject - EVS Chapter - Air we breathe
AIR WE BREATHE
1. Fill in the blanks with the options present in the bracket.
a. All humans need air to ___________. (eat/ sleep/ breathe) b. The quantity of water vapour in the air is referred to as ____________ humidity. (absolute/ partial/ complete) c. Slow air movement in coastal areas is called ____________. (wind/ breeze/air) d. Breathing becomes ________ as we go up. (easy/ difficult)
2. Declare whether the statement is True or False and if it is False, correct it.
a. Air is limited. (__________) ___________________________________________________. b. Industries and factories should be shifted near the residential areas. (____) ___________________________________________________. c. Our surroundings should be clean. (_______) ___________________________________________________.
3.
Match the following:
a. b. c. d. e.
Breeze Gust We breathe We exhale Air mostly contains
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i. Nitrogen ii. Carbon dioxide iii. Slow wind in coastal areas iv. Fast, sudden and strong wind. v. Oxygen
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ANSWER
1. a. b. c. d.
Breathe Absolute Breeze Difficult
2. a.False. Correct statement - Air is unlimited. b. False. Correct statement - Industries and factories should be shifted away from the residential areas. c.True 3. a - iii b- iv c- v d- ii e- i
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