Show:
Pure Substances
Mixtures
Particle Theory
Homogeneous Mixture
Heterogeneous Mixture
100
What is a pure substance?
A pure substance is not mixed with any other substance or material, and cannot be separated.
100
What is a mixture?
Mixtures are two or more substances that are mixed together but not chemically joined.
100

The three states of matter are

Solid, liquid, gas

100

Give an example of a homogeneous mixture

Salt water, coffee, apple juice, vinegar, air
100

Give 3 examples of a heterogeneous mixture.

Trail Mix, cookies, salad, Italian dressing

200
What are the two main types of pure substances?
Elements and Compounds
200

What are the two main types of mixtures?

Heterogeneous & Homogeneous

200
What is something that has all identical particles?
Pure Substance
200

Why does salt dissolve in water?

Because the salt particles are more attracted to the water particles than to other salt particles.

This is because of the positive and negative charges (opposite charges attract)

200
What is the difference between heterogeneous and homogeneous mixture?
Homogeneous looks the same throughout and you can't take the mixture apart. Heterogeneous can be taken apart and is very easy to tell the parts of the mixture.
300
The periodic table contains what?
Elements
300

A solution is what type of mixture?

Homogeneous

300

What happens to the particles of an ice cube when they are heated up? Give 3 characteristics.

The particles begin to move faster, become less attracted to each other, and move further away from each other. This causes the ice to melt into a liquid

300

Identify the solute and solvent in a solution of iced tea

Solute: iced tea powder/sugar

Solvent: water

300

Orange juice is an example of this type of heterogeneous mixture

Suspension

400
What is a compound? Give an example to support your answer.
A compound is a substance formed when two or more elements are chemically joined (Example: NaCl aka salt)
400

What substance is known as the Universal Solvent?

Water

400

The state of matter with a definite volume but indefinite shape

Liquid

400

What are the two parts of a homogeneous solution

Solute and Solvent.

400

Milk is an example of this type of heterogenous mixture

Colloid
500
Give three examples of an element.
Iron (Fe), Sodium (Na), Hydrogen (H) etc...
500

How could I separate salt from water?

Evaporation

500

What happens to particles when they are frozen?


They are tightly packed and vibrate, however they cannot move.

500

Give an example of a homogeneous mixture that is not a liquid.

Brass, air, paper

500

What method of separation would you use to remove large pieces from a liquid, such as coffee grounds from water?

Filtration