EASY
7th West Bengal Board
IMPORTANT
Earn 100

Write the names of three non-metals that are more abundant in the human body than in the earth's crust.

Important Questions on Role of Substances in Environment

EASY
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 4 - Role of Substances in Environment>Exercise 2
Name the four elements which contribute 97% of the total mass of human body.
EASY
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 4 - Role of Substances in Environment>Exercise 3
Write the names of three aquatic plants which can prepare their own food using photosynthesis.
EASY
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 4 - Role of Substances in Environment>Exercise 4
Name two animals that have a thick layer of lipid below their skin.
MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 4 - Role of Substances in Environment>Exercise 4>Q (1)
Write the special characteristics of the plants growing in mangrove forests.
MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 4 - Role of Substances in Environment>Exercise 4>Q (2)
Write the special characteristics of the animals that hunt at the night.
MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 4 - Role of Substances in Environment>Exercise 4>Q (3)
Write the special characteristics of the plants that grow in hot and dry areas.
MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 4 - Role of Substances in Environment>Exercise 5

Complete the following table giving the suitable examples of plant which we take it as food.

Part of a plant body Name of the plant
Underground root  
Underground or normal stem  
Leaves  
Fruits  
EASY
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 4 - Role of Substances in Environment>Exercise 6

Complete the following table by giving the suitable taste of the fruit or vegetable given below:

Name of fruit or vegetable Taste
Lemon  
Ripe mango   
Pineapple  
Bitter gourd