U1S5 Density

Physical Science

What is mass?

The amount of matter in an object.

What is volume?

The amount of space an object takes up.

What is density?

The amount of mass in a given volume.

What does derived mean in measurement?

Obtained from something else, such as being calculated from other measurements.

What does relative mean in science?

Compared to something else.

What is mass measured with?

A balance.

What are common units for mass?

Grams and kilograms.

What are common units for volume?

Cubic centimeters (cm³) and liters (L).

How can you measure the volume of a regularly shaped solid?

Use a formula such as L × W × H or π × r² × h.

How can you measure the volume of an irregularly shaped solid?

Use the water displacement method.

How can you measure the volume of a liquid?

Use a graduated cylinder.

Is density a derived unit of measurement?

Yes, because it is calculated from mass and volume.

What is the formula for density?

Density = Mass ÷ Volume.

What are the units for density?

Grams per cubic centimeter (g/cm³) or grams per milliliter (g/mL).

How can density be used to identify a substance?

Different substances have characteristic densities that can be compared to known values.

How does density determine whether an object sinks or floats?

If the density of an object is greater than the density of the fluid, it sinks; if less, it floats.