Matter Unit Test

Front

What happens to the volume of a gas when the pressure is decreased (temperature constant)?

Back

The volume increases.

Front

If a solid object has a mass of 63 g and occupies a volume of 21 mL, what is its density?

Back

Density = Mass/Volume = 63 g / 21 mL = 3 g/mL.

Front

Why do objects with a lower density than water float?

Back

Because they displace a volume of water that weighs more than the object.

Front

What can you say about the shape of solids?

Back

They have their own shape.

Front

What will happen to an object with a mass of 21 g and a volume of 7 cm³ when placed in water?

Back

It will sink.

Front

Define density.

Back

Density is the mass of an object divided by its volume (Density = Mass/Volume).

Front

What is the relationship between pressure and volume in gases?

Back

According to Boyle's Law, when the pressure of a gas decreases, its volume increases, provided the temperature remains constant.

Front

What is the formula for calculating density?

Back

Density = Mass / Volume.

Front

What happens to the density of an object if its mass increases while its volume remains constant?

Back

The density increases.

Front

What is the state of matter that has a definite shape and volume?

Back

Solid.