Secondary School (English Medium) (5 to 8) कक्षा ८ - CBSE Question Bank Solutions

State whether the following statement is ‘True’ or ‘False’.

The plane in which the earth revolves around the sun is called equatorial plane of earth.

Meteors are not visible during the daytime. Explain the reason.

Suppose the distance between the earth and sun becomes half of its present distance. What is likely to happen to life?

Explain with a diagram how you can locate pole star with the help of the constellation Great Bear (Ursa Major).

Trees help in reducing the pollution of our environment. Lakhs of trees are planted by people in the month of July every year. The occasion is called

Which of the following is not a green house gas?

Name the chemicals which are used in refrigerators and air conditioners and damage ozone layer when released in air.

Name two gases that are mainly responsible for acid rain.

In the following statement, the underlined words are jumbled up. Write them in their correct form.

Carbon dioxide, thaneme, nitrous oxide and water vapour are known as heengrouse sesga.

Rayon is a fibre obtained by the chemical treatment of wood pulp.

A liquid fuel, used in homes is ______.

Fuel must be heated to its ______ before it starts burning.

Give reasons.

LPG is a better domestic fuel than wood.

Name the unit in which the calorific value of a fuel is expressed.

What is menstruation? Explain.

Reproductive age in women starts when their ______.

Sprinkling of powder on the carrom board ______ friction.

Alida runs her toy car on dry marble floor, wet marble floor, newspaper and towel spread on the floor. The force of friction acting on the car on different surfaces in increasing order will be

Sound can travel through ______.

Sound cannot travel in vacuum.