Question 1

What is matter made of that cannot be seen with the naked eye?

Accepted Answer

Tiny particles called atoms

Answer

Microscopic bacteria

Answer

Large pieces of rocks

Answer

Cells of living things

Question 2

Which statement best describes the composition of matter?

Accepted Answer

Matter is made up of invisible particles called atoms.

Answer

Matter is composed of visible cells that form large structures.

Answer

Matter is made up of layers that can be seen.

Answer

Matter is formed from tiny pieces of plants and animals.

Question 3

Which of the following illustrates that matter is made of particles too small to be seen?

Accepted Answer

Air fills a balloon even though you can't see the particles.

Answer

A tree growing taller each year.

Answer

A rock breaking into smaller pieces.

Answer

Water boiling and turning into steam.

Question 4

What happens to the particles in an ice cube when it melts into water?

Accepted Answer

The particles stay the same but move more freely.

Answer

The particles become larger and weigh more.

Answer

The particles change into different particles.

Answer

The particles disappear completely.

Question 5

How can scientists model that matter is made of particles too small to be seen?

Accepted Answer

They use diagrams and simulations to represent atoms.

Answer

They count the visible particles with the naked eye.

Answer

They enlarge the particles with a magnifying glass.

Answer

They capture images of the particles with regular cameras.

Question 6

What happens to the particles in a liquid when it turns into a gas?

Accepted Answer

The particles spread out and move more freely.

Answer

The particles combine to form larger particles.

Answer

The particles disappear completely.

Answer

The particles settle at the bottom.

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