P.6 Chemical Reactions Unit Pre-Test

Front

What indicates a chemical change?

Back

A temperature change (without external heat added/removed) indicates a chemical change.

Front

What is defined as 'a group of atoms joined together in a particular way'?

Back

A molecule is defined as 'a group of atoms joined together in a particular way'.

Front

What is defined as 'something that can be observed about a substance, such as color, smell, or boiling point'?

Back

A property is defined as 'something that can be observed about a substance, such as color, smell, or boiling point'.

Front

Do different substances have the same or different properties?

Back

Different substances have different properties.

Front

If two samples have the same repeating groups of atoms, will their properties be the same or different?

Back

The other properties will be the same because the repeating groups of atoms that make up the two samples are the same.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

What are reactants?

Back

Reactants are the starting materials in a chemical reaction.

Front

What are products?

Back

Products are the substances that are formed as a result of a chemical reaction.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.