Chemical Reactions

Front

Atoms cannot be created or destroyed but they can be rearranged is an example of ____________________________.

Back

The Law of Conservation of Matter

Front

What kind of scientist forms new materials by studying chemical reactions?

Back

Materials scientist

Front

Which of the following are properties of matter?

Back

All of the above (Magnetism, Color, Odor)

Front

Given the densities of the following objects, which objects would float? Gold, 19.3 g/ml, a marshmallow: 0.34 g/ml, Copper: 9.0 g/ml, a toy boat: 0.43 g/ml.

Back

The marshmallow and the toy boat.

Front

On the pH scale the range 8-14 represents a(n)

Back

base

Front

What is a chemical reaction?

Back

A process where substances (reactants) transform into new substances (products) with different properties.

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 an example of a chemical reaction?

Back

Burning wood, which produces ash, smoke, and gases.

Front

What is the role of a catalyst in a chemical reaction?

Back

A catalyst speeds up a chemical reaction without being consumed in the process.

Front

What does the term 'reactants' refer to in a chemical equation?

Back

Reactants are the starting substances that undergo a chemical change.