1.1 The Particle Model

What are materials made up of?

• Tiny particles

• Empty space

• Invisible energy

• Large particles

Which of the following is an example of a substance?

• Wood

• Silver

• Soil

• Rock

What do the properties of a substance describe?

• What it's made of

• What it does

• How it looks

• All of the above

What does the particle model describe?

• The arrangement and the movement of particles

• The size of particles

• The weight of particles

• The color of particles

Which factor does not affect the properties of a substance?

• What its particles are like

• How its particles are arranged

• The color of the particles

• How far apart the particles are

Why is a gold coin heavier than a copper coin of the same size?

• Gold particles are closer together than copper particles.

• Gold particles are larger than copper particles.

• Gold particles are held together more strongly than copper particles.

• Gold particles are heavier than copper particles.

Why does one gram of steam take up more space than one gram of liquid water?

• Steam particles are held together more strongly than liquid water particles.

• Steam particles are larger than liquid water particles.

• Steam particles are further apart more than liquid water particles.

• Steam particles are heavier than liquid water particles.

Why does liquid water flow but solid rock does not flow?

• Water particles are smaller and lighter than solid rock particles.

• Water particles can move around because they are lighter.

• Rock particles are held in one place.

• Rock particles are further apart more than solid rock particles do.

Why is silver easier to scratch than diamond?

• Silver particles are larger than diamond particles.

• Silver particles are held together more strongly.

• Silver particles are held together less strongly than diamond.

• Diamond particles are smaller and lighter than silver particles.

How many particles make up one grain of sugar?

• 1 000 000 000 000 000 000

• 1,000,000,000

• 1,000,000

• 1,000,000,000,000