Matter Flashcards
Alchemists
Olden-day ‘chemist’ who mixed chemicals and tried to change ordinary metals into gold
Investigations
Activity aimed at finding information
Observations
Information by the use of our senses
Scientists
People who use experiments to find new things or how something works
Elements
Pure substance made up of only one type of atom
Atoms
Very small particles that make up everything
Atomic number
Number of protons in the nucleus of an atom
Chemical symbol
A symbol of the element
Compounds
Substance made up of two or more different types of atoms
Bonded
Force that holds particles of matter
Mixtures
A combination of substances together
Hydrogen
The element with the smallest atom
Oxygen
A gas in the air that we breath
Group
In the periodic table of elements where there are some that are similar
Inert
Not reactive
Noble gas
Elements in the last column of the table
Solid
Hard and firm
Liquid
Flows freely but is of constant volume
Gas
Air-like fluid substance which expands freely to fill any space available
Properties
Characteristics or features of an object or substance
Diffusion
The spreading of one substance through another due to the movement of their particles
Volume
The amount of space taken up by an object or substance
Fluid
A substance that flows and has no fixed shape. Gases and liquids are fluids
Particle model
A description of the moving particles that make up all matter and how they behave
Expands
Increase in size due to the movement of particles in a substance
Contracts
Shorten or become smaller in size
Melting point
The temperature at which a solid substance turns into a liquid
Boiling point
The temperature at which a liquid changes to a gas
Sublimation
The change in state from a solid into a gas
Precipitation
Falling water in solid or liquid form
Meteorologist
Scientist who uses observation of the atmosphere to predict or explain the weather
