any chemical reaction that absorbs heat from its environment in order for the

reaction to occur, resulting in a feeling of cold

any chemical reaction that releases energy into the environment in the form of

heat, light, or sound

hydrocarbons formed from the remains of dead plants and animals that have

been buried under pressure

an exothermic chemical reaction that occurs when a substance reaches its

ignition point & combines with oxygen to produce heat and light (a flame)

any material made from plants or by animals that contains stored energy from

the sun that can be converted to usable energy

must occur for chemical energy to be released

which is NOT an example of a fossil fuel

Photosynthesis is an exothermic reaction because energy is required from the

sun in order to convert carbon dioxide and water into glucose.

Digestion is an exothermic reaction because energy is released when food is

broken down.

A chemical reaction occurs when bonds between atoms or molecules are

(a)   or ​ (b)