Unit 1, Key Words 3 - Mixing Dissolving & Separating

Question 1

Gas

Answer 1

The state of matter when particles have no fixed position and are far away from each other

Question 2

Air pollution

Answer 2

Harmful particles and gasses in the air

Question 3

Boiling point

Answer 3

The temperature at which liquid changes state to a gas

Question 4

Compressed

Answer 4

When particles are squashed together by a force

Question 5

Chromatography

Answer 5

The process used to separate soluble substances / mixtures

Question 6

Chromatogram

Answer 6

The resulting pattern of colours/results from chromatography

Question 7

Dye

Answer 7

A coloured pigment or chemical

Question 8

Separate

Answer 8

To split apart

Question 9

Paper chromatography

Answer 9

A simple method of separating dyes or inks

Question 10

Forensic

Answer 10

A term used to describe scientists who use evidence to help the police investigate crimes

Question 11

Reliable

Answer 11

The same results would be obtained again even if carried out by different people using different equipment

Question 12

Accurate

Answer 12

Close to the true value

Question 13

Evidence

Answer 13

Information gathered in a scientific way which supports or contradicts a conclusion

Question 14

Dissolve

Answer 14

To mix a solid with a liquid so that it can no longer be seen

Question 15

Molecule

Answer 15

Two or more atoms held together by strong chemical bonds

Question 16

Volatile

Answer 16

Describes a substance which evaporates quickly

Question 17

Model

Answer 17

A diagram or three dimensional object that makes an idea easier to understand

Question 18

Atom

Answer 18

The basic building block of an element that cannot be chemically broken down

Question 19

Pure

Answer 19

When only one type of element or compound is present

Question 20

Law of Conservation of Mass

Answer 20

The total mass of the reactants is the same as the total mass of the products