Force and Pressure — Science STD 8 — Question

Manure is a natural substance obtained from the animal and plant waste, like cow dung, human waste and plant residue. It supplies essential elements to the soil and makes it more fertile. But, it is not much helpful when a particular nutrient is required in the soil for. particular crop. Which one of the following reason given below is the possible reason for this?

Part of the eye which controls the light entering is called:

The image of an object formed by a plane mirror is:

A When does a body float on water?

In thunderstorm, the charges accumulate near the upper edges of clouds are:

A boy rolls a rubber ball on a wooden surface. The ball travels a short distance before coming to rest. To make the same ball travel longer distance before coming to rest.

The process of purification of an impure metal is like:

Not correct about, endemic species:

Which leaves are used by farmers to protect their crops from weeds and insects?