
Phase Changes and Properties of Matter

Interactive Video
•
Chemistry, Science
•
9th - 12th Grade
•
Medium

Ethan Morris
Used 9+ times
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the process called when a solid turns directly into a gas?
Freezing
Condensation
Melting
Sublimation
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the phase diagram of CO2, what is the point called where solid, liquid, and gas phases coexist?
Boiling Point
Triple Point
Melting Point
Critical Point
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which phase of CO2 has a higher density at higher pressures?
Solid CO2
Liquid CO2
Gaseous CO2
Supercritical CO2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a supercritical fluid?
A fluid that cannot dissolve materials
A fluid that behaves like a solid
A fluid with properties of both gas and liquid
A fluid that only exists at low temperatures
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Beyond the critical temperature, what happens to a gas when pressure is increased?
It becomes a supercritical fluid
It becomes a solid
It becomes a liquid
It remains a gas
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the phase diagram of water, what is the slope of the melting point line?
Positive
Negative
Zero
Undefined
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why does ice float on water?
Ice is heavier than water
Ice is denser than water
Ice is less dense than water
Ice has the same density as water
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