States of Matter

Question 1

particle matter

Answer 1

a description of the moving particles that make up all matter and how they behave. The model explains the properties of solids, liquids and gases.

Question 2

expands

Answer 2

increase in size due to the movement of particles in a substance

Question 3

contracts

Answer 3

shorten or become smaller in size

Question 4

alchemists

Answer 4

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

Question 5

investigations

Answer 5

activity aimed at finding information

Question 6

observations

Answer 6

information obtained by the use of our senses or measuring instruments

Question 7

scientists

Answer 7

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

Question 8

elements

Answer 8

pure substance made up of only one type of atom

Question 9

elements

Answer 9

elements that conduct heat and electricity; shiny solids that can be made into thin wires and sheets that bend easily. Mercury is the only liquid metal.

Question 10

non-metals

Answer 10

elements that do not conduct electricity or heat. They melt and turn into gases easily and are brittle and often coloured.

Question 11

mettaloids

Answer 11

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

Question 12

periodic table

Answer 12

a table listing all known elements. The elements are grouped according to their properties and in order of the number of protons in their nucleus.

Question 13

group

Answer 13

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

Question 14

inert

Answer 14

not reactive

Question 15

noble gas

Answer 15

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