What is matter?

• Substances that are always solid

• Only living organisms

• Anything that has mass and takes up space

• Objects that can be seen with the naked eye

Which of the following is NOT an example of matter?

• A dog

• A shadow

• A TV

• A pencil

What are the smallest units that make up matter?

• Compounds

• Atoms

• Molecules

• Cells

How do particles in a gas behave?

• They are tightly packed and move slowly

• They are free-flowing and move rapidly

• They are closely packed and vibrate in place

• They are stationary and do not move

Which state of matter has particles that are closely packed and move very slowly?

• Solid

• Liquid

• Gas

• Plasma

What process turns a gas into a liquid?

• Sublimation

• Freezing

• Condensation

• Evaporation

What happens to particles during evaporation?

• They form a solid structure

• They stop moving completely

• They speed up and spread apart

• They slow down and come closer together

How can we observe particles that are too small to see with the naked eye?

• Using a camera

• Using advanced microscopes

• Using a magnifying glass

• Using a telescope

What technology helps us see the parts of a cell?

• Cameras

• Binoculars

• Telescopes

• Microscopes

What can advanced microscopes help us discover?

• The speed of light

• The size of planets

• The color of objects

• The structure of small organisms