Vocabulary
Everything that has mass and takes up space
Matter
What are the little bits of matter called in the model we have been learning about?
Particles
A block of cheese is an example of a...
Solid
What is the temperature scale we use in Canada?
Celsius
How closely packed particles are within a space is called what?
Density
The amount of matter in something
Mass
How are particles arranged within a solid?
Tightly packed together.
A substance cannot be compressed, Has high attractive forces, and is a fixed shape. It is a...
Solid
What is the freezing/melting point of water?
0°C
Order the states of matter by how strong the attractive force is between their particles.
Amount of space and object takes up
Volume
The particles of a substance have moved farther apart and are starting to move faster. What has happened to the substance?
It has been heated up.
Name two properties of liquids.
They take the form of their container, cannot be compressed, can be poured, particles can move around.
If you stretch a balloon over the top of a bottle and put the bottle into boiling water, what will the balloon do? Why?
It will inflate. The air particles will spread out and take up more space, filling the balloon.
What is one way that engineers can design buildings that can resist temperature changes?
Expansion joints, temperature resistant materials
The change of state from gas to liquid.
Condensation
How do particles respond when they are cooled down?
The draw closer together, slow down, and the attractive forces between them increase.
When a substance changes states, which physical property stays the same?
Mass
Describe how a liquid thermometer works.
As the liquid in the thermometer is heated the particles in the liquid move farther apart. This causes the liquid to increase in volume. This extra volume is forced up into the tube which shows the temperature. When cooled, the particles move closer together again, lowering the volume instead.
Name two possible impacts that could happen if ice had a higher density than liquid water.
Lots of responses.
The change of state from solid to gas
Sublimation
Describe how the particles behave when enough heat is applied to a liquid to cause a phase change.
When a substance changes states, what is the physical property that does change?
Volume
Why does ice float?
The particles form special bonds between each other which hold them in a structure which has more space between the particles. This causes the density of ice to be lower. As a liquid, the particles are constantly moving around on top of each other so the density is higher.
Why can things float?
The density of the substance that is floating is lower than the density of the liquid it is floating on.