Question Bank Solutions for CBSE Class 7 - CBSE - Science

Why do organisms need to take food?

Fill in the blanks:

Green plants are called __________ since they synthesise their own food.

Match the items given in Column I with those in Column II:

Fill in the blanks:

The main steps of nutrition in humans are  __________, __________, ___________, 

__________and __________

Match the items of Column I with those given in Column II:

You must be familiar with the given nursery rhymes

Baa baa black sheep, have you any wool.

Answer the following:

Which parts of the black sheep have wool?

You must be familiar with the following nursery rhymes:

Mary had a little lamb, whose fleece was white as snow

Answer the following:

What is meant by the white fleece of the lamb?

Which of the following does not yield wool?

What is meant by term Rearing?

What is meant by term Shearing ?

What is meant by term Sericulture?

Given below is a sequence of steps in the processing of wool. Which are the missing steps? Add them

Shearing, __________, sorting, __________, __________, __________

Given below is a crossword puzzle based on this lesson. Use hints to fill in the blank spaces with letters that complete the words.

Down

(D) 1: Thorough washing

2 : Animal fibre

3 : Long thread like structure

Across

(A) 1 : Keeps warm

2 : Its leaves are eaten by silkworms

3 : Hatches from egg of moth

State similarities and differences between the laboratory thermometer and the clinical thermometer.

Give two examples each of conductors and insulators of heat.

Fill in the blanks:

Temperature of boiling water cannot be measured by a __ __ thermometer.

State the differences between acids and bases.

Ammonia is found in many household products, such as window cleaners. It turns red litmus blue. What is its nature?

Name the source from which litmus solution is obtained. What is the use of this solution?

Mark ‘T’ if the statement is true and ‘F’ if it is false:

Nitric acid turns red litmus blue. (T/F)