Lesson 1.

Question 1

What are particles?

Answer 1

A particle is a tiny bit of matter.

Question 2

What is:
a) the arrangement of particles.
b) the relative distance between particles.
c) the main movement of particles in solids.

Answer 2

a) regular.
b) very close.
c) vibrate about fixed positions.

Question 3

What is:
a) the arrangement of particles.
b) the relative distance between particles.
c) the main movement of particles in liquids.

Answer 3

a) random.
b) close.
c) move around each other.

Question 4

What is:
a) the arrangement of particles.
b) the relative distance between particles.
c) the main movement of particles in gases.

Answer 4

a) random.
b) far apart.
c) move quickly in all directions.

Question 5

Why do you not shade between particles?

Answer 5

Matter is not continuous and instead is made from particles.

Question 6

List three ways models are used.

Answer 6

Models are used to solve problems, to make predictions, and to develop scientific understanding.

Question 7

List examples of scientific models.

Answer 7

Some scientific models are built from pieces. Other types of scientific models are chemical equations, diagrams, or analogies.

Question 8

Why do scientists build models?

Answer 8

Scientists use models to explain the things they see happening.