Chemistry

Question 1

Solid

Answer 1

state of matter that has a fixed shape and volume

Question 2

Liquid

Answer 2

state of matter that has a fixed volume, but no fixed shape

Question 3

Gas

Answer 3

state of matter with no fixed shape or volume

Question 4

Properties

Answer 4

characteristics or features of an object or substance

Question 5

Mass

Answer 5

the quantity of matter in an object (usually measured in grams or kilograms) a

Question 6

Volume

Answer 6

the amount of space taken up by an object or substance

Question 7

Fluid

Answer 7

a substance that flows and has no fixed shape. Gases and liquids are fluids.

Question 8

Melting point

Answer 8

the temperature at which a solid substance turns into a liquid (melts) or a liquid turns into a solid (freezes)

Question 9

Boiling point

Answer 9

the temperature at which a liquid changes to a gas

Question 10

Sublimation

Answer 10

the change in state from a solid into a gas (or from a gas into a solid) without first becoming a liquid

Question 11

Precipitation

Answer 11

falling water in solid or liquid form. The type of precipitation depends mostly on the temperature in the clouds and the air around them.

Question 12

Meteorologists

Answer 12

scientist who uses observation of the atmosphere to predict or explain the weather

Question 13

Alchemist

Answer 13

olden-day ‘chemist’ who mixed chemicals and tried to change ordinary metals into gold. Alchemists also tried to tell the future.

Question 14

Investigation

Answer 14

activity aimed at finding information

Question 15

Scientist

Answer 15

people skilled in or working in the fields of science; scientists use experiments to find out about the material world around them

Question 16

Observation

Answer 16

information obtained by the use of our senses or measuring instruments

Question 17

Elements

Answer 17

pure substance made up of only one type of atom

Question 18

Atom

Answer 18

a very small particle that makes up all things. Atoms have the same properties as the objects they make up.

Question 19

Atomic number

Answer 19

number of protons in the nucleus of an atom. The atomic number determines which element an atom is.

Question 20

Chemical symbol

Answer 20

the standard way that scientists write the names of the elements, using either a capital letter or a capital followed by a lowercase letter.

Question 21

Compound

Answer 21

substance made up of two or more different types of atoms that have been joined (bonded) together

Question 22

Bond

Answer 22

force that holds particles of matter, such as atoms, together

Question 23

Mixture

Answer 23

a combination of substances in which each keeps its own properties

Question 24

Hydrogen

Answer 24

the element with the smallest atom. By itself, it is a colourless gas and combines with other elements to form a large number of substances, including water

Question 25

Oxygen

Answer 25

a gas in the air (and water) that animals need to breathe in; made up of particles with two oxygen atoms

Question 26

Metal

Answer 26

elements that conduct heat and electricity;

Question 27

Non metal

Answer 27

elements that do not conduct electricity or heat.

Question 28

Metalloids

Answer 28

elements that have the appearance of metals but not all the other properties of metals

Question 29

Periodic table

Answer 29

elements that have the appearance of metals but not all the other properties of metals

Question 30

Group

Answer 30

in the periodic table of elements, a single vertical column of elements whith a similar nature

Question 31

Inert

Answer 31

not reactive

Question 32

Noble gases

Answer 32

elements in the last column of the periodic table. They are extremely inert gases.

Question 33

G

Answer 33

G

Question 34

F

Answer 34

R