Density

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 happens to air molecules when they are heated?

Back

When air molecules are heated, they separate and move apart from each other.

Tags

NGSS.MS-PS1-4

Front

Why do some substances float on water?

Back

Some substances float on water because they are less dense than water.

Front

What is the formula for calculating density?

Back

The formula for density is: density = mass / volume.

Front

What happens to the density of air when it cools?

Back

When air cools, it becomes more dense.

Tags

NGSS.MS-PS1-4

Front

If an object has a mass of 20g and a volume of 10mL, what is its density?

Back

Density = mass / volume = 20g / 10mL = 2 g/mL.

Front

What is the relationship between density and buoyancy?

Back

An object will float if it is less dense than the fluid it is in, and sink if it is more dense.

Front

What is the unit of measurement for density?

Back

The unit of measurement for density is typically grams per milliliter (g/mL) or kilograms per cubic meter (kg/m³).

Front

How does temperature affect the density of liquids?

Back

As temperature increases, the density of most liquids decreases because they expand.

Tags

NGSS.MS-PS1-4

Front

What is an example of a substance that is less dense than water?

Back

Oil is an example of a substance that is less dense than water and will float on its surface.