How do Organisms Reproduce? — Science STD 10 — Question

Name the ultimate source of energy of fossil fuels.

State one use of concave mirror based on the formation of image as in case (z) above.

Name the semi-conductor material which is usually used for making solar cells.

If different resistors have the same value of electric potential across them, in which way they are connected to each other?

Name the major programme started to replenish forests.

Name the hardest natural substance known.

Name the defect of vision which makes the eye-lens cloudy resulting in blurred vision.

In the refining of silver, the recovery of silver from silver nitrate solution involved displacement by copper metal. Write down the chemical equation of the reaction involved.

In the reactor of a nuclear power plant, name the material which is used:
As a moderator.