Which of the following happens during a lunar eclipse?
a: earth casts a shadow on the moon.
b: the moon casts a shadow on earth.
c: earth stops revolving in its orbit.
d: earth starts revolving around the moon.

The answer is A: Earth casts a shadow on the moon.

Explanation:

A lunar eclipse occurs when the earth passes between the sun and the moon, and the three of them are aligned. As the light of the moon that we see from the earth is actually the reflection of the sun's rays on it, when the earth is between the moon and the sun, it doesn't let the sun's rays to reach the moon, so what we see is the shadow of the earth over the moon.

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.