Physical and Chemical Changes lesson 3 Inspire Science

The total amount of mass on the right side of a chemical equation is always equal to the total amount of mass on the left side of the equation.

• True

• False

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NGSS.MS-PS1-5

Chemical reactions are the only way to form compounds.

• True

• False

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NGSS.MS-PS1-1

The chemicals on the right side of an equation are referred to as the reactants.

• True

• False

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NGSS.MS-PS1-1

NGSS.MS-PS1-5

Acids have a low pH.

• True

• False

Which is a chemical change?

• melting ice

• boiling water

• a candle burning

• frost forming on the inside of a freezer

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following indicate that a chemical reaction has occurred?

• the formation of gas bubbles

• a change in color

• an odor

• all of these indicate that a chemical reaction has occurred

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NGSS.MS-PS1-2

A combustion reaction usually results in heat and ______.

• light

• an acid

• oxygen

• a base

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NGSS.HS-PS1-4

A solid formed by the chemical reaction of some solutions is a ________.

• mixture

• reactant

• precipitate

• base

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NGSS.MS-PS1-2

When reactants form products, a(n) ______ has occurred.

• base

• chemical reaction

• acid

• mixture

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

What law states that the total mass of the reactants equals the total mass of the products in a chemical reaction?

• Law of motion

• Law of matter

• Law Conservation of Mass

• Law of science

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NGSS.MS-PS1-2

NGSS.MS-PS1-5