Question 1:Which statement best describes heating by radiation? a Air at the equator rises and sinks at the poles.

b Warm air rises and takes heat with it; eventually it cools and sinks.

c Air molecules touch the warm ground, heating them up.

d Sunlight travels through space without the aid of fluids or solids

Peat deposits are found in waterlogged places where dead plant material piles up. when peat is buried, it undergoes compaction. it is subjected to heat and pressure for a long time, and a lot of water is squeezed out during this process. nearly ten vertical feet of original peat material becomes one vertical foot of coal. which of these remains unchanged in the system during the conversion of peat to coal? a) area b) density c) mass d) volume