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Free download in PDF CBSE class 7 Science Short Questions with Answers. Here Gkseries provide Science Solve Questions and Answers for CBSE class 7 Students.
141
Which microbe is used to decompose sludge into bio gas?
[A]
aerobic bacteria
[B]
anaerobic bacteria
[C]
algae
[D]
fungi
Answer: anaerobic bacteria
142
Sewage is a _______ waste which causes which causes water and soil pollution.
[A]
solid
[B]
liquid
[C]
gaseous
[D]
all of these
143
Which of the following trees should be grown nearby sewage ponds?
[A]
Eucalyptus trees
[B]
Ashoka trees
[C]
Mango trees
[D]
Banana trees
144
Which of the following is a FALSE statement?
[A]
Solid wastes such as tea leaves and soft toys should be thrown in dustbin.
[B]
Chemicals like paints and medicines should not be thrown in sink.
[C]
Cooking oil should be thrown down in the wash basin.
[D]
Polythene bags should not be thrown in the drains.
Answer: Cooking oil should be thrown down in the wash basin.
145
Which one of the following is NOT considered as animal?
[A]
human
[B]
earth worm
[C]
jelly fish
[D]
all of these are animals
Answer: all of these are animals
146
Which forms the lowest layer in a forest?
[A]
Tall Trees
[B]
Shrubs
[C]
Herbs
[D]
None of these
147
Which of the following is NOT TRUE about forests?
[A]
Dead and decaying matter enrich the soil of the forest.
[B]
Interconnected network of food chain forms a food web.
[C]
Animals excreta pollute forest soil.
[D]
Forests are green lungs.
Answer: Animals excreta pollute forest soil.
148
The branched part of a tree above the stem is called as ________.
[A]
Crown
[B]
Canopy
[C]
Understorey
[D]
Shrubs
149
Tigers, Lions, Leopards belong to which of the following group?
[A]
Carnivores
[B]
Decomposers
[C]
Producers
[D]
Herbivores
150
The covering of large trees that serve as a roof to shelter an area or other plants in forests is called ___________.
[A]
Canopy
[B]
Crown
[C]
Carnival
[D]
none of these
151
Green plants synthesize their food by the process of __________
[A]
Respiration
[B]
Photosynthesis
[C]
Crown
[D]
Reproduction
152
Green plants are also referred as _________
[A]
Consumers
[B]
Producers
[C]
Decomposers
[D]
Herbivores
153
Steam is which form of water?
[A]
solid
[B]
liquid
[C]
gas
[D]
none of these
154
The region covered by water is called ___________
[A]
hydrosphere
[B]
ionosphere
[C]
atmosphere
[D]
water park
155
Which one of the following is not responsible for water shortage?
[A]
Rapid growth of industries
[B]
Increasing population
[C]
Heavy rainfall
[D]
Mismanagement of water resources
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