LockeD! Mixtures and Solutions #1

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 easily to separate because all the beads—

• are less dense than water

• are solids

• have the same mass

• are attracted to a magnet

A student stirs together a mixture of hot water and small amounts of salt, sand, and sugar. The student then pours the mixture through a paper towel. Which substance or substances will collect on the paper towel?

• Only the sugar

• Only the sand

• Both the salt and the sugar

• Both the salt and the sand

Tags

NGSS.MS-PS1-2

In an experiment salt and sand are mixed together. Which of these procedures could be used to most easily separate the salt from the sand?

• stir the mixture into a glass of water

  pour the mixture in a glass through a filter

  evaporate the water

• pour the mixture onto a piece of paper

  brush the mixture into a pile

  drag a magnet through the pile

• put the mixture in a pan

  heat the pan for 10 minutes

  let the mixture cool slowly

• spread the mixture into a thin layer

  look at the mixture through a magnifying glass

  separate the crystals with a pin

Carbon powder and iron filings are both black powders. When mixed together, they look like one black powder. Which of these would be best to use to separate the iron filings from the carbon powder?

• A magnifying glass

• Heat

• A magnet

• Water

A company collects cans for recycling. Some cans are made of aluminum, and some are made of iron. Which of the following is the best way to separate the two types of cans?

• Heat the iron cans until they melt

• Use scissors to cut the cans

• Use a magnet to pick up the iron cans

• Float the cans in water

Tags

NGSS.MS-PS2-5

A student mixes three spoonfuls of sand with one cup of war water in an open container. The student puts the container of sand and water near a window for four days. How many spoonfuls of sand will be in the container when all of the water has evaporated?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-4

Which of these mixtures would be easiest to separate?

• Fruit salad

• Powdered lemonade

• Hot chocolate

• Instant pudding

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

• add glue to the mixture

• place a magnet in the bowl

• pour the mixture into a paper cone

• add water to the bowl

Which of these mixtures can be separated by using a magnet?

• A mixture of sand and sugar

• A mixture of sand and iron pieces

• A compound of hydrogen and oxygen

• A compound of sugar and water

Some students made trail mix by putting peanuts, chocolate chips, and raisins in a bowl. Why did the trail mix taste both sweet and salty?

• The peanuts and the raisins were both crunchy and soft.

• The peanuts stayed salty while the raisins and chocolate chips stayed sweet.

• The peanuts remained sweet while the raisins stayed crunchy

• The chocolate chips, and the raisins were very salty.