Chemical Reactions

Front

Different substances always have the same properties.

Back

False. Different substances have different properties.

Front

What kind of reaction causes fire to be hot?

Back

Exothermic. Exothermic reactions release heat.

Front

Everything is made of atoms.

Back

True. All matter is composed of atoms.

Front

Atoms can be destroyed in a chemical reaction.

Back

False. Atoms cannot be created or destroyed in a chemical reaction.

Front

Can atoms be created in a chemical reaction?

Back

False. Atoms cannot be created or destroyed in a chemical reaction.

Front

What is a chemical reaction?

Back

A process where substances (reactants) are transformed into new substances (products).

Front

What is the law of conservation of mass?

Back

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

Front

What is an endothermic reaction?

Back

A reaction that absorbs heat from its surroundings.

Front

What is an exothermic reaction?

Back

A reaction that releases heat to its surroundings.

Front

What are reactants?

Back

Substances that undergo a chemical change in a reaction.