Mixtures/Solutions Review

A cup of sand is mixed into a bucket of rocks. Another cup of sand is mixed into a bucket of water. Which statement best compares the two buckets?

• Only the bucket with rocks is a solution because the materials must be chemically divided from the rocks.

• Both buckets are solutions because the materials must be separated by chemical means.

• Both buckets are mixtures because the materials can be separated by physical means

• Only the bucket with water is a mixture because the sand can be dissolved by the water.

A student poured some salt into a glass of water. After the water was stirred, no solid salt remained in the glass. Which statement best describes what happened?

• The salt dissolved in water to form a solution

• The salt reacted with water to form a mixture.

• The salt reacted with water to form an element.

• The salt dissolved in water to form a compound.

Phillip prepared a fruit drink and salad for a party. The chart lists the ingredients for both.

Using the information in the chart, which statement is the best

description of the fruit drink and salad?

• The salad and the fruit drink are both mixtures because all ingredients kept their physical properties.

• The salad and the fruit drink are both solutions because some of the ingredients in each dissolved into another ingredient.

• The salad is a solution because an ingredient dissolved into another.

• The lemonade is a solution because an ingredient dissolved into another.

What does a mixture of rocks and water have in common with a mixture of salt and water? In both mixtures –

• two substances are combined

• a solid dissolved in a liquid

• the same substances are used

• the final appearance is the same

A student investigated what happens when different substances are added to water. The table shows his results. In which mixture does one substance dissolve in another?

• Pepper and water

• Sugar and water

• Sand and water

• Flour and water

A sieve is a wide container with a flat bottom. The bottom has many small holes, all the same size. Which of the following mixtures could be separated using a sieve?

• Nuts and raisins

• Salt and pepper

• Sand and gravel

• Aluminum nails and iron nails

Which of the following mixtures could be separated with a magnet?

• Aluminum cans and iron cans

• Plastic cups and paper cups

• Wooden blocks and plastic blocks

• Pencil leads and rubber erasers