Unit 3 - 2nd Half Test

This is when atoms rearrange to form one or more new substances.

• Chemical Reaction

• Physical Reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

This is when the substances that exist before and after the change are the same, although the way they look may be different.

• Chemical Reaction

• Physical Reaction

Tags

NGSS.MS-PS1-4

This is a description of a reaction using element symbols and chemical formulas.

• Chemical Formula

• Chemical Equation

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Matter cannot be created or destroyed.

• conservation of mass

• compound

Tags

NGSS.MS-PS1-5

The left side of a chemical equation.

• reactant

• electron

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The right side of a chemical equation.

• subscript

• product

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Substance that contains two or more different elements (ex: H2O).

• chemical symbol

• compound

Tags

NGSS.MS-PS1-1

Combination of symbols & subscripts representing a substance.

• chemical symbol

• chemical formula

Tags

NGSS.MS-PS1-1

Which of the following is CERTAIN PROOF that a chemical reaction has occurred?

• bubbles

• change in chemical properties

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which statement about chemical and physical changes is correct?

• Neither physical changes nor chemical changes produce new substances.

• Chemical changes produce new substances; physical changes do not.

Tags

NGSS.MS-PS1-2