Unit 2 Flashcard Prep

Front

What is a process that changes one set of chemicals into another set of chemicals?

Back

Chemical reaction

Front

What type of reaction releases energy in the form of heat?

Back

Exothermic reaction

Front

What is the movement of energy from one particle to another called?

Back

Energy transfer

Front

What happens to the particles of substances in a chemical reaction?

Back

They break apart and reform as new substances.

Front

What type of reaction absorbs energy and feels cold?

Back

Endothermic reaction

Front

What is the term for a reaction that involves the breaking and forming of bonds?

Back

Chemical reaction

Front

What is an example of an exothermic reaction?

Back

Combustion of fuels, such as burning wood or gasoline.

Front

What is an example of an endothermic reaction?

Back

Photosynthesis in plants.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it is conserved.