Changes of State
This change occurs when a gas turns into a liquid.
What is Condensation?
Thermal energy moves from a warmer object to a cooler object; this transfer is called this.
What is heat?
The downward line on the cooling graph shows that the substance is doing this with thermal energy.
What is losing thermal energy?
This change occurs when a solid turns into a liquid
What is melting?
This transfer happens through direct contact, like heat moving through a metal spoon in hot soup.
What is conduction?
At point A on the time graph, the substance is in this state.
What is liquid?
This change occurs when a liquid turns into a solid.
What is freezing?
This transfer moves warm water upward and cooler water downward in a heated pot.
What is convection?
At point B, this change of state is beginning.
What is freezing
On a cooling graph, a flat section shows this happening while temperature stays the same.
What is a phase change?
This transfer travels by waves and can warm your hands by a campfire without touching it.
What is radiation?
This type of thermal energy transfer cannot occur through interstellar space because it needs matter to circulate.
What is convection?
As a substance cools, the upper plateau shows this change, and the lower plateau shows this change
What are condensation and freezing?
In a pot of water on a stove, this occurs through the pot, and it circulates in the water.
What are conduction and convection?
For thermal energy to transfer between two objects in contact, this must be different.
What is their temperature?