Matter

57 4 1
                                    

What happens to particles of a solid as it is heated? What is needed for a change in state to happen?

What do you think when I say particle? Are solids, liquids and gases all made of particles? Are particles everywhere?

Solids
The particles are close together due to strong forces of attraction.
They have a fixed pattern.
They vibrate in the spot.
They can't be compressed.

Liquids
They can flow, adapting to the shape of the container.
They don't have a regular pattern.
They move around.
They can't be compressed.

Gasses
Weak attraction between the particles.
The particles DO NOT have a regular pattern.
The particles move the fastest of all three states of matter.
The particles CAN be compressed.

What makes a solid a solid, a liquid a liquid, a gas a gas?
The arrangement of particles make them either a solid, a liquid or a gas.

Matter gets bigger (expands) when it gets hotter.
Matter gets smaller (contracts) when it is cooler.

What happens when a substance changes its state?
The speed, the distance, the energy and the attraction between the particles is DIFFERENT during the changes of state.

Boiling point
The minimum temperature needed for a liquid to become gas.

Melting point
The minimum temperature need for a solid to become liquid.

Atoms
The tiniest particle of matter.
Smaller than cells.

Elements
A substance made of only one kind of atom.
Every element has it's own properties.
Can be found as single-atoms or molecules.

Compounds
They are substances made of different elements joined.

Compounds
To separate the elements that make a compound, you should do a chemical reaction.

Mixtures
They are made of substances that are NOT chemically joined.
To separate the substances of a mixture, you do a physical process.

Alloys
Alloys are examples of mixtures made of:  Metals + Non-metals (carbon).

Atoms and molecules
There are atoms of certain elements that like to be single: Single atoms.
Others atoms like to be together: Molecules.

Educational StuffWhere stories live. Discover now