The Particle Theory
What is a particle?
A tiny piece of matter we cannot see.
When a liquid changes to a solid, it is called?
Freezing
Pizza
(Mechanical) Mixture
Recycling Facilities use a magnetic drum to separate metals like tin cans and wire hangers from other materials.
Magnetism
What science term means "to mix completely"?
Dissolve
Particles move faster when this happens to them.
When they are heated.
This state of matter has a fixed shape.
Solid.
Salt
Pure Substance
When you make a pot of coffee, you're using this method of separation to make sure there are no coffee grinds in your cup!
Filtration
Identify the solute in salt solution
Salt
Particles are doing this all the time.
Moving
Which two states of matter can flow?
Liquid and Gas.
Air
Mixture (Solution)
Using a strainer to look for gold in a river bed.
Sifting/sieving
Name two substances that are insoluble.
Oil, sand, rocks, paper, flour, etc.
True or False: Particles in a solid are touching.
False - All particles have empty spaces between them.
In which state of matter are the particles farthest apart?
Gas.
Aluminum Foil
Pure Substance
To make maple syrup, sap is thickened by boiling off excess moisture in a vat for extended periods of time. What separation technique is used to separate water from maple sap?
Evaporation
When a solution is "full" and cannot dissolve any more solute, we say it is...?
Saturated
The Particle Theory states this about particles in a pure substance.
Particles are identical (all the same) in a pure substance.
During distillation, we separate a mixture by boiling and evaporating one substance, then changing that gas back to a liquid in a cooling chamber and collecting it. When a gas cools and changes to a liquid it is called...?
Condensation
Tap Water
Mixture (Solution)
Give an example of flotation and settling.
- Sewage Treatment Plant
- Swimming Pool
- melted fat on top of soup
- sand settling in water
You can add solvent to make a solution thinner or weaker. This is called...?
Diluting