Particle theory
True or false: Particles never touch.
True
The method used to separate different coloured candies.
What is sorting?
Name a commonly known pure substance.
Water, oxygen, gold, silver, iron, copper, aluminum, sodium, pure salt... etc.
What is water/H2O?
State at least one of the uses of uranium.
Nuclear power, nuclear weapons, cancer treatments, medical imaging, age-dating materials, etc.
This happens when particles heat up.
When do particles move faster?
State the one of the two ways you can use to separate salt from water.
What is distillation or evaporation?
The type of mixture this is:🍕
What is a heterogeneous mixture?
True or false: you can't dissolve something in a gas.
False
One of the ways uranium is bad for humans.
What is toxicity and radioactivity?
Particles are all the same in a _________.
What is a pure substance?
Gold miners use this method to get gold from sand in rivers.
When oil and water are mixed together, they create _____________.
What is an emulsion?
The formula for concentration.
What is:
Concentration= Mass of solute Volume of solution
Where are Kazakhstan, Canada, and/or Australia?
Particles move faster in gases and only vibrate in solids. Why?
In gases they have more space and in solids they're squished together really close.
I dropped my salt into some iron filings! If I want the filings, how do I get them. If I want the salt, how do I get it?
Iron filings: Use magnets
Salt: Use dissolving
A mixture where the particles aren't dissolved, but temporarily hanging in the solvent.
What is a suspension?
Process of making a supersaturated solution:
1. Dissolve your solute in your solvent until you can't anymore
2. Heat up your solution
3. Dissolve more solute
4. Leave it to cool
What happens when it cools?
The solution will become unstable and the solute will crystallize.
Explain the two processes used to get pure substances from the Earth and make them usable for humans.
Mining: Either done in open pits or underground, needed to extract the substances.
Refining: People need to refine the raw materials they’re found in to get the pure substances out.
Explain the water cycle from the perspective of a raindrop. Use all the proper terms like evaporate, condense, and precipitation.
1. I evaporate with heat from the sun.
2. I condense into a cloud with other raindrops.
3. When the cloud is too full, we fall to Earth as precipitation.
4. The cycle repeats.
Mark is trying to get clean water from dirty, muddy water. Help him figure out 2 separation techniques to use.
Mark can use filtration, settling, or distillation.
I am a water molecule throwing a party with only other water molecules invited. Am I hosting a pure substance or a mixture?
Pure substance
Lucy is trying to dissolve sugar in water. The water is warm but the sugar isn't dissolving fast enough. What could be a potential problem?
The sugar is in too big chunks to dissolve fast enough, not enough water, the water is already saturated...etc.