Topic 2: Lessons 1-2

Front

What does it mean to differentiate?

Back

To identify the differences between two or more objects.

Front

What is a solid?

Back

A solid is matter with a definite shape and volume.

Front

What is density?

Back

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

Front

What is pollution?

Back

Pollution is any contamination of air, soil, and water, and/or environment.

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 is matter?

Back

Matter is anything that has mass and takes up space.

Front

What are the three states of matter?

Back

The three states of matter are solid, liquid, and gas.

Front

What is a liquid?

Back

A liquid is matter that has a definite volume but no definite shape.

Front

What is a gas?

Back

A gas is matter that has no definite shape or volume.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force of gravity acting on that mass.