Things around us Worksheet-3

Things around us Worksheet-3

 

Multiple-Choice Questions:

  1. Plants also respire to obtain energy from the food they make by _____.

(A) Chlorophyll   (B) Respiration    (C) Photosynthesis

 

  1. _____ is not used to prepare chlorophyll.

(A) Soil                                              (B) Carbon dioxide

(C) Sunlight                                      (D) Water

 

  1. The nutrients released from dead bodies by the action of scavengers and decomposers get mixed with the soil and are again absorbed by plants. This process is called ______.

(A) Recycling of plants                    (B) Recycling of minerals

(C) Recycling of animals                 (D) Recycling of nutrients

 

  1. They are primary consumers

(A) Tiger and Bear                           (B) Rabbit and deer

(C) Tiger and lion                             (D) Human being and bear

 

  1. Following is a cold-blooded animal.

(A) Reptiles          (B) Birds               (C) Mammals

 

  1. Soil is very rich in minerals like

(A) Magnesium, potassium, and calcium

(B) Magnesium, potassium, and manganese

(C) Magnesium, potassium, and phosphorus

(D) Magnesium, potassium, and zinc

 

True/False:

  1. Photosynthesis gives plants the special ability to make their own food using sunlight, water, and carbon dioxide.
  2. Plants absorb nutrients such as nitrogen, phosphorus, and calcium from the soil.
  3. Animals that feed on the dead bodies of other animals are called decomposers.
  4. Scavengers and decomposers help in the recycling of nutrients in the environment.
  5. Carnivores such as human being and bear feed on both plants and other animals.
  6. Scavengers and decomposers feed on dead plants and animals and release the nutrients trapped inside their bodies into the soil.
  7. Earth is the only known planet that has a temperature suitable for life to exist.
  8. Mammals and birds are cold-blooded.
  9. Green plants play a very important role in maintaining the balance of oxygen and carbon dioxide in the environment.
  10. Dust suspended in the air are not blown away by wind, they combine with smoke and water vapour and remain suspended in the air as smoky environment.
  11. Water dissolves vital gases like oxygen and carbon dioxide and allows sunlight to penetrate water bodies.

 

Answer:

  1. (C)
  2. (A)
  3. (D)
  4. (B)
  5. (A)
  6. (C)
  7. False

Exp:  Chlorophyll gives plants the special ability to make their own food using sunlight, water, and carbon dioxide.

  1. True
  2. False

Exp:  Animals that feed on the dead bodies of other animals are called scavengers.

  1. True
  2. False

Exp:  Omnivores such as human being and bear feed on both plants and other animals.

  1. True
  2. True
  3. False

Exp:  Mammals and birds are warm-blooded.

  1. True
  2. False

Exp:  Dust suspended in the air are not blown away by wind, they combine with smoke and water vapour and remain suspended in the air as smog.

  1. True