Unit 3 Review

Physical Properties

100

If you have an object that sinks in water, what must its density be? 

Hint: Water has a density of 1 g/mL

Greater than 1 

200

What do we call properties that can be determined without altering the composition of a substance? 

Physical Property

300

If you find a substance that melts at 0 degrees Celsius, is not magnetic, is a poor thermal and electrical conductor, has a density of 1 g/mL and boils at 100 degrees Celsius, what is it?

Water

400

If you find an unknown substance that sticks to a magnet, does not dissolve in water and conducts electricity, what could it be?

Iron, Nickel or Cobalt

500

If you have an unknown substance that is not magnetic, does not allow electricity to follow through it, and floats in water what must it be?  

Use the chart to help you. 

Maple Wood

Magnetism, Melting and Boiling points

100

What is the temperature at which a solid turns to a liquid called? 

Melting point

200

What is the boiling point of this substance?  

120 Degrees Celsius 

300

True or False: Melting and Boiling points can change if you have more of a substance. 

False 

400

What is magnetism? 

A non-contact force that pulls on certain metals from a distance. 

500

What are the only 3 magnetic elements? 

Iron, Nickel and Cobalt

Solubility

100

If something is NOT able to dissolve, we describe it as ________ 

insoluble 

200

What do we call the substance we are trying to dissolve? 

Solute

300

What do we call the substance we put the solute into? 

Solvent

400

If a substance is able to dissolve but has reached a point where nothing else is able to dissolve, we say it has reached what? 

Saturation Point

500

If we mix copper into gold to make yellow gold, what would be the solute? 

copper 

Conductivity

100

What do we call the ability of a substance to allow electricity to pass through it? 

Electrical Conductivity

200

What do we call the ability of a substance to allow heat to pass through it? 

Thermal Conductivity

300

Name 3 good Electrical Conductors. 

Lemon juice, Sea water, Most metals 

400

Name 3 good thermal conductors. 

Most metals, glass

500

True or False: If you have more of the substance, it will make it a better conductor. 

False

Density

100

True or False: Density will always stay the same no matter how much of the substance you have.

True

200

What is the formula for finding the volume of a regular shaped object?

V=LWH

300

What is the formula for finding the volume of an irregularly shaped object?

V=F-I

400

Draw the density triangle 

My Dream Vacation

500

If a substance's density is less than the density you are putting it into, it will ______ 

Float