Particle Model
What are the tiny building blocks that make up everything around us called?
What are particles?
This process happens when ice turns into water.
What is melting?
On the Celsius scale, water freezes at this temperature.
What is 0°C?
When gas is heated, it does this to take up more space.
What is expand?
This property tells us how much space a substance takes up.
What is volume?
In which state of matter do particles vibrate in fixed positions and are packed closely together?
What is a solid?
When water vapour turns back into liquid water, this process occurs.
What is condensation?
Water boils at this temperature on the Celsius scale.
What is 100°C?
When gas is cooled, it does this and takes up less space.
What is contract?
During a phase change, this property stays the same while volume changes.
What is mass?
This state of matter has particles that are far apart and move very fast in all directions.
What is a gas?
At 100°C, water undergoes this change of state.
What is boiling?
When particles are heated, they move this way.
What is faster?
Engineers use these special joints in bridges to allow for expansion and contraction.
What are expansion joints?
Ice floats on water because it has this type of density compared to liquid water.
What is lower density?
In liquids, particles can do this to each other while staying close together.
What is slide past each other?
This special change of state occurs when a solid turns directly into a gas without becoming a liquid first.
What is sublimation?
The coldest temperature ever recorded in Alberta was this many degrees Celsius.
What is -61.1°C?
If expansion and contraction aren't properly planned for, materials can do these two things under stress.
What is crack or break?
Room temperature is approximately this many degrees Celsius.
What is 22°C?
Name all four states of matter, including the one we don't focus on in Grade 6.
What are solids, liquids, gases, and plasma?
Name the five different state changes that can occur between solids, liquids, and gases.
What are melting, freezing, boiling, condensing, and subliming?
A liquid thermometer works by measuring the expansion or contraction of this.
What is matter?
Name two types of structures where engineers must account for thermal expansion and contraction.
What are buildings, bridges, or sidewalks? (Accept any two)
The hottest temperature ever recorded in Alberta reached this temperature in Bassano.
What is 43.3°C?