Matter Test Review

Definitions

100

Molecule

Two or more atoms joined together.

200

Model

A picture or object used to show something that is too small, big, or hard to see.

300

Phase Change

When matter changes from one state to another (like melting or freezing).

400

Solubility

How well a substance can dissolve in a liquid (usually water).

500

Physical Property

Traits of a substance that can be measured or observed without changing what the substance is.

Writing it Out

100

How would a scientist write the molecule of water which is 2 Hydrogen and 1 Oxygen

H₂O

200

Draw a model of an molecule with 1 Hydrogen atom, 1 Nitrogen atom, and 1 Oxygen atom

Hold up your White Board

300

What atoms are in the molecule O₃N₂?

3 Oxygen and 2 Nitrogen

400

A molecule has 4 Hydrogen atoms, and 2 Oxygen atoms. How would a scientists write this?

H₄O₂

500

What atoms are in the molecule H₈N₃O?

8 Hydrogen, 3 Nitrogen, 1 Oxygen

Phase Change

100

You leave some ice out and a few minutes later is been seemingly replaced by a puddle of water. What type of phase change occured?

Melting

200

What happens to the mass of an object during phase change?

The mass remains the same

300

You set your cold drink out on a hot day and a few minutes later the outside of the glass is covered with water. What type of phase change occured?

Condensation

400

Explain how the particles act during evaporation

The water molecules get excited and start moving around faster and faster causing them to turn into gas

500

You put some dry ice into a fog machine and it starts going from a solid right to a gas. What phase change is occuring?

Sublimation

Moving Particles

100

How are the particles in a solid arranged?

They are packed tightly together and can only move by vibrating

200

When you add heat, what happens to the particles in the object?

They become exited and start moving faster

300

As you remove heat the kinetic energy of particles in phase change will what?

Decrease

400

Name all 6 different phase changes matter can go through?

Freezing, Melting, Evaporation, Condensation, Sublimation, and Disposition

500

As water boils steam starts to make the lid of the pot rattle around. Why is this happening?

The water molecules are crashing into the top of the lid as they rise causing the lid to rattle

Which is It?

100

You are making some lemonade out of some powered mix. Is the lemonade powder the solute or solvent?

Solute

200

You are adding some salt into your soup. Is the soup the solvent or solute?

Solvent

300

You see an old iron fence rusted over. Clearly the iron has the property to rust. Is this property physical or chemical?

Chemical Property

400

You accidentally pour water into your bag of sugar. Which is the solute and which is the solvent?

The water is the solvent and the sugar is the solute

500

You put a pot on to boil. Is this a physical or chemical property?

Physical Property