Thermal expansion and contraction
solids, liquids, and gases
changes of phase
thermal equilibrium and conduction
miscellaneous
100
A fancy word for heat energy
What is thermal energy?
100
This state of matter holds its own shape and has a set volume
What is a solid?
100
turning a liquid into a solid
What is freezing?
100
Heat always moves this way
from hot to cold
100
Mass, volume, and density: are they the same or different after freezing water into ice? Explain
Mass is the same, no particles are added or subtracted
Volume and density change- the particles actually spread out, causing volume to increase and density to decrease
200
This is what happens when heat is added to a substance
What is... the particles move faster and further apart?
200
This state of matter has no set shape or volume, and will fill any container its placed in.
What is a gas?
200
when particles rolling around slow down so much they start to vibrate in place
What is freezing?
200
What we feel when heat leaves
what is cold?
200
the freezing and melting points, boiling and condensation points for water
What is 0*C and 100*C?
300
This is what causes particles to move closer together and slow down/the cause of thermal contraction
What is subtraction of heat?
300
The "macro" description of liquids... (shape and volume)
What is... liquids take the shape of their container and have a set volume?
300
On a hot day, water appears on the outside of a cold glass because...
What is... water vapor in the air condensed on the surface of the glass when the heat moved from the air into the cold glass
300
You place cake batter in a cake pan in the oven set at 350*F, and it sits there for 30 min. When you pull it out, what temperature is the cake, what temperature is the pan, and why?
What is everything is 350*F because of thermal equilibrium- heat will move from hot to cold until everything is the same temperature
300
Solid is always the most dense state, except for this substance
What is water?
400
This is the property that stays the same when objects expand or contract
What is mass?
400
the least dense state of matter
What is... a gas?
400
When you add heat to a liquid, this process is sped up
What is evaporation?
400
This explains why metals are better conductors
They have more free electrons
400
what causes a non-newtonian liquid to change from solid to liquid
What is pressure?
500
These are the properties change when objects expand or contract
What is volume and density?
500
the most dense state of matter
What is a solid?
(except for water)
500
Carbon dioxide is normally in the air around us. It has extremely low forces of attraction. It will freeze to a solid at -78*C. If you bring it up to room temperature, it will skip the liquid phase and _____.
What is sublimate?
500
You place an ice cube in a pan in a 21*C room, put the pan on a stove burner, and turn the burner on. Draw a diagram that shows all locations of heat transfer
burner to pan, burner to air, pan to ice, pan to air, air to ice
500
A sealed balloon has a volume of 5 liters. Then minutes later, the sealed balloon has a volume of 5.1 liters. What is the best explanation for why the volume of the balloon increased?
The volume of the balloon likely increased because heat energy was added to the balloon, causing the particles to push outwards on the balloon as they moved around more from their increased energy