What are the three states of matter present on Earth?
Solid, liquid, gas
How can matter change phases?
By changing the amount of energy
What phase of matter (solid, liquid, or gas) has a definite volume and a definite shape?
Solid
What phase of matter (solid, liquid, or gas) has a definite volume but an indefinite shape?
Liquid
What phase of matter (solid, liquid, or gas) has an indefinite volume and an indefinite shape?
Gas
To change a solid into a liquid, you need to ADD/REMOVE energy
Add
To change a gas to a liquid, you need to ADD/REMOVE energy
Remove
What is absolute zero? Can we get to it?
Absolute zero is the point of temperature where molecules stop moving. Absolute zero (at around -273.15 C) is impossible to reach (yet we've come 0.00000015 degrees K away from it).