Science Week 23 Chemical and Nuclear Energy

the energy that bonds atoms together to form a molecule or molecules

together to form a substance

• exothermic

• chemical

• endothermic

• combustion

• biomass

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

reaction to occur, resulting in a feeling of cold

• exothermic

• chemical

• endothermic

• combustion

• biomass

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

heat, light, or sound

• exothermic

• fossil fuels

• endothermic

• combustion

• chemical

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

been buried under pressure

• exothermic

• fossil fuels

• endothermic

• combustion

• chemical

an exothermic chemical reaction that occurs when a substance reaches its

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

• exothermic

• fossil fuels

• endothermic

• combustion

• biomass

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

the sun that can be converted to usable energy

• exothermic

• fossil fuels

• endothermic

• combustion

• biomass

must occur for chemical energy to be released

• fusion

• equilibrium must be reached

• chemical reaction

• conduction

which is NOT an example of a fossil fuel

• oil

• wood

• coal

• natural gas

Photosynthesis is an exothermic reaction because energy is required from the

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

• True

• False

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

broken down.

• True

• False