Whenever energy appears in one system, A.
it must have come from somewhere else.
B.
it means the system is suitable for creating energy.
C.
it must be used quickly or it will be permanently lost.
D.
it means energy creation has outpaced energy destruction.

d bonding propertys

explanation:

carbon can form so many different compounds not just with oxygen

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.