Question

question #12
what is the reason some of the earths energy received from the sun returns back into space?
a it is reflected by clouds and the earths surface
b it is reflected by the sun
c it is absorbed by clouds and the earths surface
d it is absorbed by the sun
question #13
what energy transformation takes place when you turn on an electric light?
a mechanical → light + heat
b chemical → light + heat
c chemical → electrical + heat
d electrical → light + heat

Explanation:

Question 12

When solar radiation reaches Earth, some is reflected. Clouds and Earth's surface (like ice, snow, etc.) reflect solar energy. The sun doesn't reflect Earth - received energy back (it emits energy). Absorption (by clouds or Earth's surface) doesn't send energy back to space.

When an electric light is turned on, electrical energy (from the power source) is transformed. It is not mechanical (no moving parts in the basic energy - in sense here) or chemical (no chemical reactions providing the initial energy). Electrical energy is converted to light (the purpose of the bulb) and heat (as a by - product, bulbs get warm).

Answer:

A. It is reflected by clouds and the earth's surface

Question 13