change of states.

Question 1

what is a change of state?

Answer 1

substance that changes one state to another.

Question 2

what is the term for when: it goes from a solid to a liquid?

Answer 2

melting.

Question 3

what is the term for when: it goes from a liquid to a gas?

Answer 3

evaporation.

Question 4

what is the term for when: it goes from a gas to a liquid?

Answer 4

condensing.

Question 5

what is the term for when: it goes from a liquid to a solid?

Answer 5

freezing.

Question 6

describe the arrangement and motion of particles in solids, liquids and gases?

Answer 6

solid: particles vibrate around a fixed point and have a regular arrangement.
liquid: particles have an irregular arrangement and more energy which increases vibrations.
gas: particles have a random arrangement and flow around freely.

Question 7

what are the limitations of particle models?

Answer 7

particles are circles not spheres.
there are forces in between particles which is not shown in the models.
particles in a solid don’t literally sit in rows.