Upgrade to remove ads
Phase Change Concepts
Terms in this set (12)
What is a phase change?
When molecules' freedom of movement changes
Does appearance change when phases change?
Yes! Phase change results in an observable change in appearance.
Can we see the phase change in the molecular scale?
No, even though you can see the change of appearance, you cannot see the change in freedom of movement of the molecules.
What effect does energy have on freedom of movement?
Energy must be add to or taken away from molecules to change their freedom of movement.
What does temperature measure?
average kinetic energy
What happens when energy is transferred to stuff?
Kinetic energy of the molecules increases.
What happens when energy is transferred OUT of stuff?
Kinetic energy of the molecules decreases.
What makes phase change happen?
the interaction between kinetic energy of molecules and attraction pulling molecules together
Does the molecular attraction of something ever change?
No,the molecular attraction of a substance never changes.
Why does a solid keep its shape?
because its molecules only move in place, not around each other.
Why does a gas not have a visible shape?
because its molecules can move away from each other
Why is a liquid able to flow?
because its molecules move around, not away from each other
This set is often in folders with...
Phase Change Vocabulary
GB Wilson - 7th Gr Fluid Earth Systems
Physical vs Chemical Properties
GB Wilson 6th Grade Phase Changes
You might also like...
PC chapter 3 Key Concepts
IB Thermal Physics - don't use
Phase Change Engineering Internship
Chemistry Test Phase Changes
Other sets by this creator
Population and Resources
Topic 9 Lessons 5-7
Topic 9 Lessons 1-4