Physical Changes in Matter

How can you calculate the density of an object?

• add the mass and the volume

• divide the volume by by it's mass

• divide the object's mass by it's volume

• multiply the mass by the volume

Why do many liquids that you buy in the store say "shake well before using" on them?

• Because they are suspensions and they may not work or taste correctly if you don't.

• It would cost too much if the company combined them.

• There is a hidden video camera in the room.

• So it can release a diacomatic expulsion before you use it.

All of the following are physical properties except_______.

• density

• color

• the ability to melt

• ability of a solid to react with oxygen in the air

A/An ______________________ usually is the main part of a solution.

• solute

• solvent

• positive charge

• organic compound

When a solution has a lot of solute relative to the amount of solvent it is said to be a/an __________________________.

• concentrate

• dilute

• chemical change

• physical property

If a mixture is spread evenly throughout it is said to be _______________________.

• heterogeneous

• solute

• homogeneous

• solvent

All of the following will help to dissolve a solute faster except _________________.

• removing heat

• stirring

• adding heat

• increasing the surface area of the solute

We refer to ______________________ as a universal solvent.

• cooking oil

• milk

• soda

• water

If a material doesn't dissolve in a solvent it is said to be _____________.

• insoluble

• a solution

• inert

• too hot

One of the major differences between an homogeneous and heterogeneous mixture is that ________________.

• a homogeneous mixture has more solute

• a heterogeneous mixture has more solute

• a homogeneous is mixed evenly

• the way they are stored