Which of these are Molecules?

B, C, and D
Which state of matter is gas?

C
If you add heat to a gas it can become a solid.
False, adding heat makes particles speed up. Particles in gas are already running around, they cannot run faster.
Replace Add with Remove.
What form of energy is responsible for the motion of particles within a substance?
Thermal energy
Which phase of matter has the most ordered structure? Which has the least?
Most is solid
Least is Gas
Which of these are elements?

A and C
Which state of matter is liquid?

B
Adding heat leads to: Freezing, Evaporation, and Sublimation
False: Freezing is the process of removing heat from liquid to make it a solid.
Replace Freezing with Melting
What happens to atoms (particles) as they are heated up?
They spread out and expand.
Which of these are Compounds?

B and D
Which state of matter is solid?

A
If you remove heat from a solid it will become a gas?
False, removing heat makes particles slow down and come together. Solids are already almost still and close together.
A stove is turned on, the heat from the coils causes the atoms (particles) in the metal to start to expand. What happens to the atoms (particles) once the stove is turned off?
The atoms (particles) will start to slow down as they cool.