CBSE class 7 Science Quiz | CBSE class 7 Science Short Questions with Answers

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Questions
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

Answer: liquid
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143 Which of the following trees should be grown nearby sewage ponds?
A Eucalyptus trees
B Ashoka trees
C Mango trees
D Banana trees

Answer: Eucalyptus 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

Answer: Herbs
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

Answer: Crown
149 Tigers, Lions, Leopards belong to which of the following group?
A Carnivores
B Decomposers
C Producers
D Herbivores

Answer: Carnivores
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

Answer: Canopy
151 Green plants synthesize their food by the process of __________
A Respiration
B Photosynthesis
C Crown
D Reproduction

Answer: Photosynthesis
152 Green plants are also referred as _________
A Consumers
B Producers
C Decomposers
D Herbivores

Answer: Producers
153 Steam is which form of water?
A solid
B liquid
C gas
D none of these

Answer: gas
154 The region covered by water is called ___________
A hydrosphere
B ionosphere
C atmosphere
D water park

Answer: hydrosphere
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

Answer: Heavy rainfall
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