Chemistry keywords

Question 1

NEUTRAL

Answer 1

A liquid with a pH value equal to pH7.

Question 2

ACID

Answer 2

A liquid with a pH value less than pH7.

Question 3

ALKALI

Answer 3

A liquid with a pH value greater than pH7.

Question 4

ALUMINIUM

Answer 4

A very light metal used to make kitchen foil and saucepans.

Question 5

ATOM

Answer 5

The smallest possible part of a element.

Question 6

BUNSEN BURNER

Answer 6

A piece of apparatus that burns gas and is used to heat apparatus.

Question 7

CHROMATOGRAPHY

Answer 7

A way of separating a mixture of coloured dyes or pigments such as found in ink.

Question 8

COMPOUND

Answer 8

The substance formed when two or more elements are chemically combined together. eg HYDROGEN (element) + OXYGEN (element) = WATER

Question 9

CONDENSE (condensation)

Answer 9

This is what happens when a gas turns to a liquid due to being cooled down. For example when steam touches a cold mirror.

Question 10

COPPER

Answer 10

A pink metallic element. It is a very good conductor of heat and electricity. It is the metal that wires are usually made from.

Question 11

DECOMPOSE (decomposition)

Answer 11

The chemical change that takes place when a compound is split apart into two (or more) simpler substances, usually by heating.

Question 12

DISTILLATION

Answer 12

The name of the process used for obtaining the SOLVENT from a SOLUTION. Eg obtaining pure water from sea water.

Question 13

ELEMENT

Answer 13

Chemical substances that contain only one kind of atom. They are listed in the Periodic Table.

Question 14

EVAPORATION

Answer 14

The process for obtaining the solute from a solution by warming the solution and letting the solvent evaporate away.

Question 15

FILTRATION

Answer 15

The process used for separating a SOLID from a LIQUID. Eg removing dirt from water

Question 16

GRAPHITE

Answer 16

A form of carbon. The black substance inside pencils (the pencil lead).

Question 17

IMMISCIBLE

Answer 17

Two liquids that will not mix together (like oil and water)

Question 18

INSOLUBLE

Answer 18

When a substance cannot dissolve.

Question 19

MALLEABLE

Answer 19

A substance that can be hammered into thin sheets. Includes most metals. Good examples are gold, copper or lead.

Question 20

MIXTURE

Answer 20

Something that contains at least two substances that can be separated without a chemical reaction taking place.

Question 21

MOLECULE .

Answer 21

The particle formed when two or more atoms chemically join together.

Question 22

pH SCALE

Answer 22

A scale of numbers (from 1 to 14)which shows how acidic or alkaline a liquid is.

Question 23

REDUCE (reduction)

Answer 23

The kind of reaction happens when we remove the oxygen from a compound.

Question 24

RESIDUE

Answer 24

The solid remaining in the filter paper after filtering.

Question 25

SOLID

Answer 25

A solid is one of the three states of matter (the other two being liquids and gases).

Question 26

SOLUBLE

Answer 26

This is how we describe a substance that can be dissolved. Sugar is soluble in water.

Question 27

SOLUTE

Answer 27

The solid that has been dissolved when we make a solution.

Question 28

SOLUTION

Answer 28

This is the liquid obtained by dissolving one substance in another.

Question 29

STATES OF MATTER

Answer 29

SOLID, LIQUID and GAS are known as this.

Question 30

FILTRATE

Answer 30

The liquid left behind after filtering.

Question 31

REDUCING AGENT

Answer 31

An element good at removing oxygen from a compound. (Eg magnesium)

Question 32

SOLVENT

Answer 32

A liquid good at dissolving things

Question 33

OXIDISE

Answer 33

A kind of reaction when oxygen comines with another element.