Particle Model of Matter

Question 1

What is the equation for density?

Answer 1

density = mass/volume

Question 2

How can you measure the density of a solid object?

Answer 2

• Measure the mass using scales
• find the volume
• use the equation density = mass/ volume to calculate

Question 3

Describe how you can measure the density of an irregular solid.

Answer 3

1. Measure the mass of the solid using scales.
2. Find the volume by using a eureka can and measure cylinder. Fill the eureka can so that it is full. Place a measuring cylinder under the spout and place the solid into the eureka can. Measure the volume of water displaced from the can.
3. Calculate the density

Question 4

What is the density of an object that floats in water?

Answer 4

less than 1000kg/m^3

Question 5

What are the properties of a solid?

Answer 5

No flow, fixed shape, fixed volume, high density

Question 6

What are the properties of a liquid?

Answer 6

Can flow, fits container shape, fixed volume, higher density than gas

Question 7

What are the properties of a gas?

Answer 7

Can flow, fills container, volume can be changed, lower density than solid or liquid

Question 8

What are the changes of state called?

Answer 8

Solid —> Liquid Melting
Liquid —> Solid Freezing
Liquid —> Gas Boiling
Gas —> Liquid Condensation
Solid —> Gas Sublimation