Different between sperm and ovum?

1.Sperm is a male reproductive material that form at the onset of puberty.

2. Sperms are produce in immense amount.

3. Sperms are motile.

Explanation:

1. Ovum is produced in females which is called egg.

2. Ovum is nonmotile.

3. They are produced in limited amount in a process called ovulation.

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.

yo