Physical Properties & Density, Chemical Changes

Front

What is density?

Back

Density is a measure of how much mass is contained in a given volume. It is calculated using the formula: Density = Mass/Volume.

Front

What two types of measurements make up density?

Back

Mass and Volume.

Front

What happens to molecules when kinetic energy increases?

Back

They move faster.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Front

What is the relationship between phase changes and energy?

Back

All phase changes require energy to be added or taken away.

Tags

NGSS.MS-PS1-4

Front

How do you calculate the density of an object?

Back

Density = Mass/Volume.

Front

If a rock has a mass of 14g and a volume of 2cm³, what is its density?

Back

7 g/cm³.

Front

Does the amount of substance affect its density?

Back

Density is independent of the amount of substance; it remains the same for the same substance.

Front

What is the unit of density in the metric system?

Back

Common units of density include grams per cubic centimeter (g/cm³) and kilograms per cubic meter (kg/m³).

Front

What happens to the density of a substance when it is heated?

Back

Generally, the density decreases as the substance expands when heated.

Front

What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into different substances with different properties.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5