5.5c Science

A small bowl contains a mixture of toothpicks and glass marbles. The easiest way to separate the mixture without touching it would be...

• add glue to the mixture

• place a magnet in the bowl

• pour the mixture into a paper cone

• add water to the bowl

A mixture of beads was placed in a container, as shown below. The beads are of various sizes, and each one is made of plastic, glass or steel. The mixture would be easy to separate because all the beads....

• are less dense than water

• are solids

• have the same mass

• are attracted to magnets

A student made a mixture using equals amounts of salt and pepper. The salt grains were the same size as the pepper grains. What should the student do to most easily separate the pepper from the salt?

• Use a pair of tweezers to remove each grain of pepper

• Run a small magnet through the mixture to attract the pepper

• Put the mixture in water and filter the pepper out of the water.

• Use a strainer with a fine wire mesh to remove the pepper

Some people add sugar to hot tea. Which property of sugar remains the same when the sugar is in the tea solution?

• The taste of the sugar

• The size of the sugar crystals

• The color of the sugar crystals

• The texture of the sugar crystals

A student is given a beaker container gravel and water. Which of these could ways could the student NOT use to separate the gravel from the water?

• 1

• 2

• 3

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