Particle theory
True or false. Particles are always touching
FALSE
True or false, Ice cream with chocolate chips and a cherry is Homogeneous.
FALSE!
It's heterogeneous.
Can you filter water?
Yes.
What’s a solute?
The thing that gets dissolved.
What's one material we extract from the earth?
Iron, gold, diamonds, oil, or coal.
What is a mixture?
when two or more substances combine.
What is the difference between a pure substance and a mixture?
A pure substance is only one kind of particle, and a mixture has more than one kind mixed together.
How do you get metal from sand?
Magnets.
What’s a solvent?
The liquid that does the dissolving.
Do materials come out of the ground pure or as mixtures?
Usually mixtures, like ores mixed with rock.
What state of matter is this?
. . . . . .
. . . . . .
. . . .
Liquid
Why is saltwater a mixture but it looks like one substance?
Because it has more than one kind of particle in it.
Evaportation.
Why does sugar dissolve faster in hot water than cold water?
Hot water particles move faster, so they break the sugar apart quicker.
Why do we have to separate metals from ores before using them?
Because the metal is mixed with other things and isn’t pure yet.
How do you turn a liquid into a solid?
By freezing it.
Why is air a mixture but it looks like one thing?
Because air is made of different gases mixed together not just one type of particle.
Why can’t filtration separate salt from saltwater?
Because the salt is dissolved so it just goes through the filter with the water.
What’s the difference between a saturated and unsaturated solution?
Saturated has as much solute as it can hold. Unsaturated can still take more.
How can separating metals from ores harm the environment?
It uses a lot of energy and can make pollution and waste that goes into air or water.
Name five points of particle theory.
Matter is made up of tiny particles,
Particles are always moving,
Particles never touch,
Particles are attracted,
Particles move faster when heated,
All particles are made of the same thing.
Why is sugar water still a mixture even though you can’t see the sugar?
because the sugar particles are still there they're just mixed in the water so you can't see them.
Name three things that can be used to clean an oil spill.
Booms
Skimmers
Vacuums
Hair
Why won’t more sugar dissolve in a saturated solution?
All the spaces between the water particles are full, so the extra sugar can’t fit.
Why can mining and refining materials cause long-term environmental damage?
Because separating the useful particles from the waste creates chemicals and leftover materials that can spread into soil and water.