states of matter

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

diffusion

Answer 5

the spreading of one substance through another due to the movement of their particles

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

particle model

Answer 8

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 9

expands

Answer 9

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

Question 10

contracts

Answer 10

shorten or become smaller in size

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

meteorologist

Answer 12

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

Question 13

alchemists

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

investigations

Answer 14

activity aimed at finding information

Question 15

observations

Answer 15

information obtained by the use of our senses or measuring instruments

Question 16

scientists

Answer 16

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

Question 17

elements

Answer 17

pure substance made up of only one type of atom