Mixture and Solutions

Jacob added 50mL of salt to 250mL of water. He stirred it until it completely dissolved. He was asked by Mr. Lopez to separate the salt from the water. After the water evaporated how much salt was left in the beaker?

• There was 300mL left in the beaker.

• There was 50mL left in the beaker.

• There was 200mL left in the beaker.

• There was no salt left in the beaker.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Mr. Lopez spilled his favorite snack. Is it a mixture or a solution? Why?

• Its a mixture, because it is made up of 2 or more substances that can be easily separated.

• Its a mixture, because it can only be separated with a sieve.

• Its a solution, because it can only be separated by dissolving it in water.

• Its a solution because it can not be separated easily.

Isabella accidentally left the beaker full of salt water boiling on a hot plate. When she came back she shut it off and this is what was left. What is it?

• It is salt that was placed in there after she left.

• It is salt that was left behind due to evaporation.

• It is the excess salt that did not evaporate with the water.

• It is an unknown substance.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Students collected data on the appearance of four substances and how they reacted when mixed with water.

Which substances dissolved when mixed with water?

• A and B

• A and C

• B and C

• C and D

Tags

NGSS.MS-PS1-2

Mixture or Solution?

• mixture

• solution

Tags

NGSS.MS-PS1-1

The gravel has settled on the floor of the beaker and the mulch is floating. What tool would best to separate the mulch from he water?

• Hot plate

• spoon

• funnel

• filter

Tags

NGSS.MS-PS1-2

10 g of lemon powered was added to a bottle of water. What physical properties have changed?

• smell, taste, mass, color

• smell, density, state of matter

• smell, color, taste, length

• smell, color, taste, width

Tags

NGSS.MS-PS1-2

Sand and gravel may be separated from each other by using..

• a filter funnel

• a sieve

• an evaporating basin

• a distillation

A combination of 2 or more substances that can be easily separated is called- 

• a mixture

• a solution 

• a solute 

• a solvent 

Which of the following is a method of separating solutions?

• hand separation

• filtering

• screening

• evaporation