Topic 2: Lessons 1-2

Front

What is a physical change?

Back

A physical change is when some properties of matter do not change what the substance is made of.

Front

What does density measure?

Back

Density measures how compact the mass in a substance or object is.

Front

What does it mean if a substance is soluble?

Back

If a substance is soluble, it means it is capable of being dissolved in liquid.

Front

What is a gas?

Back

A gas is matter that does not have a definite shape or volume.

Front

What are particles?

Back

Particles are tiny bits of matter that make up everything in the universe.

Front

What is matter?

Back

Matter is anything that has mass and takes up space.

Front

What is the difference between a solid, liquid, and gas?

Back

Solids have a definite shape and volume, liquids have a definite volume but take the shape of their container, and gases have neither a definite shape nor volume.

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice into water.

Front

What is an example of a soluble substance?

Back

An example of a soluble substance is sugar in water.

Front

What is the formula for density?

Back

The formula for density is Density = Mass/Volume.