Pressure, Winds, Storms, and Cyclones — Science STD 8 — Question

State whether the following statements are True or False: Each sperm is a single cell.

What do you mean by transplantation ?

Fill in the blanks. The process of depositing a layer of any desired metal on another material by means of electricity is called _________.

Could you write, if there were no friction between the chalk and the board?

What term is used for the following?
The change from tadpole to frog.

Some natural resources are given below. Classify them into the exhaustible and inexhaustible natural resources.
Air, coal, natural gas, sunlight, petroleum, minerals, forests, oxygen

Name the first artificial satellite launched by India.

The eggs of frogs do not have shells for protection, yet they are safe in water, how ?

Does the force of gravitation exist between two astronauts in space?

Name the part of eye
(a) which controls the amount of light entering the eye.
(b) which converges light rays to form the image.