Mixtures

To dissolve in water.

• solubility
• density
• mixture
• evaporation

A combination of rocks and water is an example of

• A mixture
• A solution 
• Dissovling

Salt dissolves in water like ----

• Pepper dissolves in water
• Sugar dissolves in water
• Rocks dissolve in water
• Seeds dissolve in water

A student collects seashells at the beach.  Ms. Deering will not allow the student to take any sand on the bus.  If the student wishes to take the seashells home he must separate the seashells from the sand. Which of the following would be most helpful when trying to separate the sand from the sea shells?

• hot plate
• water 
• sieve
• magnet

A mixture of aluminum and steel can best be separated by ________________.

• adding water
• using a sieve
• density
• a magnet

47 grams of salt is dissolved in 700 mL of water.  How much salt will remain after the water is evaporated?

• 653 grams
• 47 grams
• none
• 37 grams

Students are conducting an experiment with salt water.  A large quantity of sand is added to the container of salt water.  What do you expect to observe?

• The salt floats to the top of the container.
• The sand dissolves.
• The sand settles to the bottom of the container.
• The salt and sand combine to form a solid.

Susan prepares a mixture of oil, lemon juice, and water as a salad dressing.  Why will she have to shake the mixture before pouring over her salad?

• The lemon juice is more dense than the water and oil.
• The oil is less dense than the water and lemon juice.
• The water, lemon juice, and oil will form layers.
• The lemon juice and oil will combine to form a solid.

If Billy were stranded on an island surrounded by the ocean he could satisfy his fresh water needs by ____________.

• filtering the ocean water to remove the salt.
• evaporating the water from the ocean and collecting the fresh water.
• digging in the sand.
• Billy doesn't really need fresh water.

A glass beaker contains 100 milliliters of water into which 5 grams of salt was stirred.  Which item should be used to separate this particular mixture?

• triple beam balance
• hot plate
• paper filter
• magnet