What is created when combustion happens without enough oxygen?
a. carbon dioxide
b. coal
c. water
d. soot

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

Amap that uses a range of colors and shading to represent the elevation, depth, or landscape of specific features on earth is a/an map.

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal