Year 7 lab safety, particle model and separating mixtures

Question 1

If a solute dissolves then it is…..

Answer 1

Soluble

Question 2

What is Diffusion?

Answer 2

Diffusion is the movement of particles from an area of high concentration to an area of low concentration going down a concentration gradient. It only happens with fluids (liquids & gases).

Question 3

What is a solvent?

Answer 3

A liquid that does the dissolving.

Question 4

What is Chromatography?

Answer 4

Splitting up the different colours in a substance to show what the substance is made up of.

Question 5

What is a solute?

Answer 5

A solute is the substance that dissolves into the solvent.

Question 6

What is distillation?

Answer 6

Distillation is the process of separating out a solid which dissolves from a solvent by evaporating the solvent and condensing it separately.

Question 7

When does a heating curve go flat?

Answer 7

When it is changing state (solid to liquid and vice-versa or liquid to gas and vice-versa)

Question 8

When does a heating curve go upwards?

Answer 8

On heating but when there is no change of state

Question 9

Do all substances have the same boiling point?

Answer 9

No!

Question 10

Which of these can change its volume?
A. Solid
B. Liquid
C. Gas

Answer 10

C. Gas

Question 11

Which of these can be compressed?
A. Solid
B. Liquid
C. Gas

Answer 11

C. Gas

Question 12

Which of these can be poured?
A. Solid
B. Liquid
C. Gas

Answer 12

B. Liquid and C. Gas

Question 13

Which of these can change its shape?
A. Solid
B. Liquid
C. Gas

Answer 13

B. Liquid and C. Gas

Question 14

What is the boiling point of pure water?

Answer 14

100 degrees centigrade

Question 15

What does insoluble mean?

Answer 15

It will not dissolve (in that solvent)

Question 16

What does evaporation mean?

Answer 16

Evaporation is the process when liquids turn into gases

Question 17

What is condensation?

Answer 17

Condensation is the process when gases turn into liquids

Question 18

What is melting?

Answer 18

Melting is the process when solids turn into liquids

Question 19

What is freezing?

Answer 19

Freezing is when a liquid turns into a solid

Question 20

What does solidifying mean?

Answer 20

Solidifying means turning from liquid into solid

Question 21

What is sublimation?

Answer 21

Sublimation is the process of a solid turning directly into a gas without becoming a liquid

Question 22

What is filtration

Answer 22

Filtering an insoluble solid out from a liquid

Question 23

What does saturated mean

Answer 23

A solution is “saturated” if it holds the maximum possible amount of a solute

Question 24

What is dissolving

Answer 24

Dissolving is the process where a solute splits up and spreads out in a solvent (dissolves)

Question 25

What are main hazards in a science lab?

Answer 25

Stuff not put away, wet floor, hot stuff, glass, chemicals.

Question 26

What is the boiling point of water

Answer 26

100 degrees Celsius / centigrade

Question 27

In which state are the particles regularly arranged?

Answer 27

A solid

Question 28

In which state are the particles able to flow over one another but have a constant volume?

Answer 28

A liquid

Question 29

In what state are the particles able to take the volume of the container?

Answer 29

A gas

Question 30

Which states of matter cannot be squashed?

Answer 30

Both liquids and solids cannot be squashed

Question 31

What are the properties of a solid?

Answer 31

A solid can’t be squashed, it can’t be poured, it can’t change it shape and can’t change its volume.

Question 32

What are the properties of a liquid?

Answer 32

A liquid can’t be squashed, it can be poured, it can change it’s shape but it can’t change it’s volume

Question 33

What are the properties of a gas?

Answer 33

A gas can be squashed, it can be poured, it can change, it shape and it can change its volume