Matter & Mixtures (Unit 4)

How is all matter alike?

• All matter dissolves in water.

• All matter can insulate from heat.

• All matter has volume and mass.

What types of matter have density?

• Only solid matter

• Only liquids and solids

• All solids, liquids, and gases

How are mixtures and solutions different?

• Unlike solutions, mixtures can be easily separated and ingredients keep their physical properties

• Unlike a solution, a mixture has density and will always sink

• Unlike a solution, a mixture can dissolve completely in liquid and the properties will change

Why might a scientist use a magnet and strainer when investigating a substance?

• To separate a difficult solution

• To take apart and easily separated mixture

• To try to create a complex solution

Which property traps heat, and what is an example of one?

• Conductor: metal

• Insulator: plastic

• Insulator: water

• Conductor: wood

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

What is happening to molecules if thermal energy is transferring away through conduction?

• Molecules are slowing down

• Molecules are disappearing

• Molecules are moving fast

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Pond water is flowing through a filter and most of the particles are being removed. What type of process is being used, and what can be assumed?

• Evaporation is removing particles, so the filter is unneeded.

• Water force is keeping the water pure, so the filter is not needed.

• Filtration is working to remove residue from the pond water.

What does it mean if a substance is soluble?

• It is an easily separated solution.

• It can mix or dissolve evenly throughout another substance.

• It keeps all of the same properties when dissolved.

Can saltwater ever be separated?

• No, the salt has disappeared.

• Yes, with a strainer.

• Yes, using evaporation.

Tags

NGSS.MS-PS1-4

When a screen/filter is used to separate a mixture, what physical properties are being used?

• Size & shape

• Temperature & texture

• Density & buoyancy