Mixtures & Solutions Unit 1 Test 2

The picture show tools that can be used for separating mixtures. Which mixtures is paired with the best tool for separating materials?

• Salt & pepper with tweezers

• Pieces of cork and pebbles with beaker of water

• Safety pins and iron nails with a magnet

• Sand and iron filings with a colander

A student fills 250 milliliters of water in a cup to 50 degrees Celsius and add 6 grams of salt. The mixture of water and salt is stirred for 15 seconds. Which results will the student most likely observe after the mixture has been stirred for 15 seconds?

Select TWO answers.

• The salt will dissolve.

• The salt will float on water.

• The water will turn from clear to opaque (cloudy).

• The water will remain clear.

• The salt will sink to the bottom of the water.

Tags

NGSS.MS-PS1-2

Five different mixtures are listed below. In which mixtures do all the substances maintain (keep) their physical properties?

Select TWO correct answers.

Mixture 1: salt, water, plastic beads

Mixture 2: sugar, water, wood chips

Mixture 3: water and sand

Mixture 4: iron filings and sand

Mixture 5: powdered drink mix and water

• mixture 1

• mixture 2

• mixture 3

• mixture 4

• mixture 5

Tags

NGSS.MS-PS1-2

Students conduct an investigation with breakfast cereal.

1. Grind 50 grams of cereal into a fine powder.

1. 2. Stir the cereal powder in 500 milliliters of warm water.

2. 3. Hold a magnet at the side of the beaker at the 250 milliliter mark.

3. 4. Stir the mixture for three minutes.

4. Which substance are the students trying to determine the presence of in the cereal?

• wheat

• sugar

• iron

• salt

Tags

NGSS.MS-PS1-2

The mass and the volume of stones and salt is shown. They are mixed together. What is true about the mixture?

• The mass of the mixture is 60 milliliters. 

• The volume of the mixture is 85 milliliters. 

• The volume of the mixture is 60 grams. 

• The mass of the mixture is 85 grams. 

Tags

NGSS.MS-PS1-2

Which tool would be most effective for separating a mixture of sand and water?

• 
• 
• 
• 

Tags

NGSS.3-5-ETS1-2

NGSS.5-PS1-4

When white marbles are mixed with black marbles the mixture will-

• be all the same color

• contain black and white marbles

• change its state of matter

• have less volume

Which substances, when mixed together, maintain their original physical properties?

• gravel and water

• wood chips, water and sand

• sand and water

• all of the above

Tags

NGSS.MS-PS1-2