Our Environment - 1 Class 3 Worksheet Science

Q1: Multiple Choice Questions (MCQs)

(i) Which of these is not a part of the environment of a fish?
(a) Trees
(b) Water
(c) Underwater plants
(d) Water insects

(ii) Which of the following is a non-living part of the environment?
(a) Animals
(b) Birds
(c) Soil
(d) Plants

(iii) Plants depend on animals for
(a) food
(b) carbon dioxide
(c) oxygen
(d) shelter

(iv) Animals depend on plants for
(a) food
(b) oxygen
(c) shelter
(d) all of these

Q2: True & False

(i) Our body is made up of 70% of water. 

(ii) Fertile soil supports rich variety of plants.

(iii) Birds and animals help plants to reproduce.

(iv) Sunlight gives warmth to plants only.

(v) Our environment includes only living organisms and not non-living elements.

Q3: Fill in the Blanks

(i) Our environment includes __________ living and non-living elements.

(ii) __________ from factories and motor cars can disturb the environment.

(iii) Excessive noise can harm the __________ of living beings.

(iv) Environment has a __________ level in every area.

(v) Tree plantation improves the environment by increasing __________ cover.

Q4: Answer the following questions in brief.

(i) Explain why excessive noise pollution is harmful to both humans and animals.

(ii) Describe one activity that can improve the environment and its impact on the surroundings.

(iii) What is the significance of recognizing the tolerance level of the environment?

(iv) Explain why controlling the use of insecticides and pesticides is essential for maintaining a healthy environment.