Mixtures and Solutions

A mixture combines 2 or more materials without changing their properties.

• True
• False

Solutions are formed when one or more substances dissolve in another.

• True
• False

Which of the following is NOT a way to separate a mixture?

• Heat a liquid to evaporate the liquid out of a solution.
• Use a magnet to separate sand particles and rocks.
• Use a filter to allow liquid to flow through and leave behind the solid particles on top of the filter.
• Use tongs to separate the parts of a salad.

Which of the following is a mixture?

• table salt

• sugar

• lucky charms cereal

• saltwater

Sally made four cups of water. She added different material in each cup and stirred it. Which of the following will form a solution with the water?

• Sugar
• Sand
• Salad oil

The 4th grade class are observing 4 beakers in a Science lab. Which of the following students made a true statement comparing the materials in the beakers. 
Beaker 1-sand and water
Beaker 2-sugar and water
Beaker 3-rocks and sand
Beaker 4-rocks and water

• All beakers have a mixture of solids.
• Beakers 1and 2 have a mixture of solids and liquids. They can both be separated with a filter.
• Beakers 1,2, and 4 are all mixtures of solids and liquids.Beaker 2 can only be separated using heat.
• Beakers 3 and 4 are a mixture of solids and liquids.

Which two tools would a student use to measure the length and mass of a gummy bear?

• graduated cylinder and balance
• stopwatch and meter stick
• ruler and a meter stick
• balance and a meter sick

Give an example of an item in the real world that is a mixture.

(a)  

Which is an example of a solution?​ (a)  

• orange juice
• salt water
• koolaid powder
• chex mix
• fruit salad

How are a mixture of sand and water and a mixture of salt and water different?

• Salt dissolves in the water. Sand does not dissolve in water.

• Sand dissolves in water. Salt does not dissolve in water.

• Sand floats in water. Salt sinks in water.

• Sand melts in the water. Salt sinks in the water.