Science

Question 1

What does a chemist study?

Answer 1

Study of chemicals and how to change them.

Question 2

What does a physicist do?

Answer 2

Study’s the behaviour of natural and manufactured substances.

Question 3

What does an ecologist do?

Answer 3

Study how living things interact.

Question 4

What does an astronomer do?

Answer 4

Study of planets, stars and the universe.

Question 5

What is an inference?

Answer 5

A likely explanation for what is observed.

Eg- observation : smelling onion

Inference: someone might be onions cooking

Question 6

What is an aim?

Answer 6

What you intend to do in the investigation.

Question 7

What is a variable?

Answer 7

A quality or condition in an experiment that is likely to change.

Question 8

What is a fair test?

Answer 8

Something that is a fair test on all scales.

Question 9

What is a controlled variable?

Answer 9

What I will keep the same.

Question 10

What is an independent variable?

Answer 10

What I will change.

Question 11

What is a dependant variable?

Answer 11

What I will measure.

Question 12

How can we tell it’s reliable?

Answer 12

Doing the experiment repeated times for a fair outcome.

Question 13

What is a pure substance?

Answer 13

A substance that contains only one kind of particle.

Question 14

What is an impure substance.

Answer 14

A mixture that contains more than one type of particle mixed together.

Question 15

What is a solution?

Answer 15

A solution is a mixture made up of one substance dissolved in another.

Question 16

What is a solute?

Answer 16

Is the substance that is dissolved.

Question 17

What is a solvent?

Answer 17

Is the substance that the solute is dissolved in.

Question 18

What does soluble mean?

Answer 18

A substance that dissolves in a solvent.

Question 19

What does dissolve mean?

Answer 19

To make a solution by mixing liquids.

Question 20

What does insoluble mean?

Answer 20

A solid that will not dissolve in a solvent.

Question 21

What does immiscible mean?

Answer 21

Two liquids which do not dissolve in each other.

Question 22

What does miscible mean?

Answer 22

Two liquids that mix evenly together.

Question 23

Define concentration.

Answer 23

The concentration of a solution is a measure of how much solute has been dissolved in a fixed amount of solvent.

No much dissolved solute = dilute.

Lots of solute dissolved = concentrated solution.

Question 24

What is a suspension?

Answer 24

A mixture of a gas or liquid and an insoluble substance the i soluble substance settles to the bottom when the mixture is left to stand.

Question 25

What is sediment?

Answer 25

The material that collects when the suspensions are left to stand (usually at the bottom).

Question 26

Define emulsion.

Answer 26

A colloid with droplets of one liquid spread even,y through another.

Question 27

Define : colloid.

Answer 27

A mixture in which extremely small particles of one substance we spread evenly throughout another.

Question 28

What does a biologist study?

Answer 28

Living things such as plants, animals and micro-organisms.