Secondary School (English Medium) (5 to 8) कक्षा ७ - CBSE Question Bank Solutions for Science

Make four electromagnets with 20, 40, 60 and 80 turns. Connect them one by one to a battery of 2 cells. Bring the electromagnet near a box of pins. Count the number of pins attracted by it. Compare the strengths of the electromagnets.

State the differences between acids and bases.

The blood from the heart is transported to all parts of the body by the ______.

Haemoglobin is present in ______ cells.

Why is blood needed by all the parts of a body?

Describe the function of the heart.

Untreated human excreta is a health hazard. Explain.

Explain the relationship between sanitation and disease.

Outline your role as an active citizen in relation to sanitation.

Stomach of human beings mainly digests ______.

The acid present in the stomach ______.

Mark the following statement as True or False. If false, write the correct statement.

Mucus protects the stomach lining from damage.

Choose the odd one out from the group and give reason.

State whether the following statement is True or False. Correct the false statement.

Tropical rain forests are cool and humid throughout the year because of heavy rains all the time.

Which of the following place is most likely to be affected by a cyclone?

Why is Chandigarh unlikely to be affected by a cyclone?

High speed wind can cause cyclone in regions of ______ pressure.

State whether the following statement is True or False:

A very high pressure system, with very high speed wind surrounding it forms a cyclone.

State whether the following statement is True or False:

The coast line of India is not vulnerable to cyclones

How are open drains harmful to human health?