Term 1 Particles

Question 1

what are the 3 main states of materials and matter?

Answer 1

solid, liquid and gas

Question 2

what type of change is a change of state?

Answer 2

physical change

Question 3

What do you call a change that you can undo?

Answer 3

reversible

Question 4

what do you call a state of change you can’t undo?

Answer 4

irreversible change

Question 5

explain the changes of state water can go through from ice to water vapour

Answer 5

ice (solid) melts above 0 degrees to become water (liquid), water boils at 100 degrees and evaporates to become a gas. It cools to become water, then freezes at 0 degrees to become ice

Question 6

when does water boil?

Answer 6

100 degrees Celsius

Question 7

when does water freeze?

Answer 7

0 degrees celsius

Question 8

what is a newtonian liquid

Answer 8

doesnt follow the rule of liquids can be hard to pour and doesnt fill container that it is poured into e.g. cornflower and water.

Question 9

Describe the particles in a solid

Answer 9

regular pattern, vibrates in a fixed position, are very close together

Question 10

Describe the particles in a liquid

Answer 10

irregular pattern, move randomly, are close together

Question 11

Describe the particles in a gas

Answer 11

are randomly arranged, move in all directions, travel in random speeds

Question 12

how do we work out density (how tightly particles packed)

Answer 12

mass /volume

Question 13

what is filtration?

Answer 13

separating a solid from one that can be dissolved to one that cant

Question 14

what is evaporation?

Answer 14

separates a liquid and solid by boiling off the liquid

Question 15

what is distillation?

Answer 15

separates liquids with different boiling points