SP9a Particles and density

Question 1

What are the arrangement and properties of solids?

Answer 1

.fixed, regular arrangement
.only vibrate in fixed position
.cannot be compressed
.strong forces of attraction
.low level of energy in KE store

Question 2

What are the arrangement and properties of liquids?

Answer 2

.particles are mostly touching
.particles move past each other in random directions at a range of low speeds
.cannot be compressed
.weaker forces of attraction
.more energy in KE store

Question 3

What are the arrangement and properties of gases?

Answer 3

.particles are free to move
.travel in random direction at range of high speeds
.gases are compressible and expand to fill container
.no forces of attraction
.high level of energy in KE store

Question 4

density(kg/m³) = ?

Answer 4

mass(kg)/volume(m³)

Question 5

1cm³ = ?m³

Answer 5

0.000001m³

Question 6

What is the density of a substance?

Answer 6

the mass of a certain volume of the substance.

Question 7

Why are most substances most dense when solid?

Answer 7

because their particles are closer together.

Question 8

What happens during a state change?

Answer 8

.re-arrangement of particles
.same number of particles
.mass is conserved

Question 9

Liquid to solid?

Answer 9

freezing.

Question 10

Solid to liquid?

Answer 10

melting.

Question 11

Liquid to gas?

Answer 11

evaporating.

Question 12

Gas to liquid?

Answer 12

condensing.

Question 13

Solid to gas?

Answer 13

sublimation.

Question 14

Gas to solid?

Answer 14

deposition.