7.1, 7.2

calorie

D: amount of energy required to raise the temperature of 1 g of water 1°C S: A calorie is the amount of energy required to raise the temperature of 1 gram of water by 1 degree Celsius.

cellular respiration

D: chemical process that uses oxygen to convert chemical energy stored in organic molecules into ATP S: Cellular respiration is a chemical process that uses oxygen to convert the chemical energy stored in organic molecules into another form of chemical energy.

Kinetic energy

D: energy of motion S: The two basic forms of energy are kinetic energy and potential energy.

potential energy

D: energy stored due to an object's position or arrangement S: Potential energy is energy that is stored due to an object's position or arrangement.

autotroph

D: organism that makes its own food S: An organism such as a plant that makes its own food is called an autotroph, which means "self-feeder" in Greek.

producer

D: organism that makes its own food (autotroph) and produces organic molecules that serve as food for other organisms in its ecosystem S: Autotrophs are also called producers because they produce the organic molecules that serve as food for the organisms in their ecosystem.

heterotroph

D: organism that obtains food by eating other organisms S: Organisms that cannot make their own food, such as humans, are called heterotrophs, meaning "other eaters."

consumer

D: organism that obtains food by eating producers (autotrophs) or other consumers S: Heterotrophs, also called consumers, must obtain food by eating producers or other consumers.

chemical energy

D: potential to perform work due to the arrangement of atoms within molecules S: Just like the molecules in gasoline and other fuels, these organic compounds have a form of potential energy called chemical energy.

photosynthesis

D: process by which plants use the sun's energy to convert water and carbon dioxide into sugars S:This process is called photosynthesis, from the Greek photo- meaning "light," and synthesis meaning "making something".

thermal energy

D: total amount of energy associated with the random movement of atoms and molecules in a sample of matter S: This type of kinetic energy, random molecular motion, is called thermal energy.