Question

phase changes
predictions

1. how does adding energy to a solid affect the motion of the particles?
2. how can a gas at room temperature (like oxygen) become solid?

experiment
test your predictions using this simulation (click phase changes).

1. start with solid argon and explain how to make argon change to the liquid state and then to the gaseous state.
2. start with gaseous argon and explain how to make the argon change to the liquid state and then to the solid state.
3. explain how the absorption of energy (heating) affects the speed of the particles in a substance.
4. explain how the release of energy (cooling) affects the speed of the particles in a substance.
5. can you make the particles of any of the substances stop moving?

making connections

1. when you apply heat energy to a substance, where does the energy go? think about the law of conservation of energy

Explanation:

These questions are about phase changes of matter, particle motion, and energy transfer, which fall under the subfield of Physics (a subfield of Natural Science). The concepts involve thermal energy, states of matter, and particle kinetics, all core topics in Physics.

Answer:

The subfield is Physics (under Natural Science).