8th Grade Science Review

Front

What is a chemical reaction?

Back

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

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the best clue that a chemical reaction has taken place?

Back

Change in color.

Tags

NGSS.MS-PS1-2

Front

What is speed?

Back

The distance traveled per unit of time, measured in meters per second (m/s) or similar units.

Tags

NGSS.MS-PS3-1

Front

What is velocity?

Back

Speed in a given direction, e.g., 800 miles per hour south.

Front

What is acceleration?

Back

The rate of change of velocity per unit of time, measured in meters per second squared (m/s²).

Front

What is force?

Back

An interaction that causes an object to change its velocity, calculated as mass times acceleration (F = m × a).

Tags

NGSS.MS-PS2-2

Front

What is the formula to calculate force?

Back

F = m × a, where F is force, m is mass, and a is acceleration.

Tags

NGSS.MS-PS2-2

Front

What is a chemical property?

Back

A characteristic of a substance that can be observed during a chemical reaction, such as flammability or reactivity.

Front

What is a physical change?

Back

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

Front

What is a valence electron?

Back

An electron in the outermost shell of an atom that can participate in chemical bonding.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2