CBSE class 7 Science Short Questions with Answers

Questions

141 Which microbe is used to decompose sludge into bio gas?

A aerobic bacteria

B anaerobic bacteria

C algae

D fungi

View Answer

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

View Answer

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

View Answer

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.

View Answer

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

View Answer

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

View Answer

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.

View Answer

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

View Answer

Answer: Crown

149 Tigers, Lions, Leopards belong to which of the following group?

A Carnivores

B Decomposers

C Producers

D Herbivores

View Answer

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

View Answer

Answer: Canopy

151 Green plants synthesize their food by the process of __________

A Respiration

B Photosynthesis

C Crown

D Reproduction

View Answer

Answer: Photosynthesis

152 Green plants are also referred as _________

A Consumers

B Producers

C Decomposers

D Herbivores

View Answer

Answer: Producers

153 Steam is which form of water?

A solid

B liquid

C gas

D none of these

View Answer

Answer: gas

154 The region covered by water is called ___________

A hydrosphere

B ionosphere

C atmosphere

D water park

View Answer

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

View Answer

Answer: Heavy rainfall

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