Mixtures and Solution Checkpoint

Which of the following is the best example of a mixture?

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A solution is a special kind of mixture. Some substances can dissolve in water to form a solution; some substances cannot. Which of the following will dissolve in water?

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Tags

NGSS.MS-PS1-2

A mixture of sand and iron filings is in a bowl. If both substances keep the same physical properties after being mixed together, how could the mixture be separated?

• 1. Stir in water

• 1. Pour through a sieve

• 1. Use a magnet

• 1. Separate with tweezers

Some materials, when they are mixed with water, will change properties and dissolve. When you stir white grains of sugar into water, you can no longer see the grains of sugar. How can you tell that the sugar is still there?

• 1. The water will taste cold.

• 1. You will start to see the grains of sugar again if you wait long enough.

• 1. The water will taste sweet like sugar.

• 1. The water will turn white like the grains of sugar.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Sand and water both keep their same physical properties when mixed together. How could you separate the two substances, keeping their physical properties in mind?

• 1. Shake the mixture until the sand dissolves.

• 1. Use a magnet.

• 1. Use tweezers.

• 1. Use a filter.

Which statement about mixtures is NOT true?  

• • A mixture is made of two or more substances that are combined.

• • Mixtures can be easily separated.

• • The substances are evenly mixed into one another.  

• • The materials in a mixture keep their properties.

Which of the following is a MIXTURE that maintains the physical properties of the substances? 

• • Water and salt 

• • Iron filings and sand 

• • Hot chocolate mix and milk 

• • Lemonade 

What happens to the properties of salt when it is mixed with water? Select two answers. 

• • The salt dissolves into the water. 

• • The salt changes color. 

• • The salt can no longer be seen. 

• • The salt changes to sugar. 

• • The salt particles become magnified in the water. 

Tags

NGSS.MS-PS1-2

Categorize the following

Groups:

(a) Mixtures

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(b) Solutions

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Which mixture can the students separate most easily using the strainer?

• salt and water

• rocks and water

• shampoo and water

• sugar and water