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Katya is surfing at the beach. She accidentally gets some ocean water and seaweed in her mouth. What do ocean water and seaweed form together?

• a mixture

• a solute

• a solution

• a solvent

Heidi combined lettuce, tomatoes, cucumbers, and shredded cheese to make a salad. Which best describes what Heidi made?

• combination

• element

• mixture

• solution

Sierra made a mixture of sand and pebbles to use for an art project. When she is finished, she wants to separate the sand and pebbles to be used for other projects. Which is the best way for her to separate the sand from the pebbles?

• by size

• by color

• by shape

• by density

Dr. Morgan is using evaporation to separate salt from water. What happens during evaporation?

• A substance changes from a gas to a liquid.

• A substance changes from a liquid to a gas.

• A substance changes from a liquid to a solid.

• A substance changes from a solid to a liquid.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Nadia has a mixture of oil and water. She wants to separate the mixture. How can she do this?

• by using a magnet to attract the oil

• by pouring the mixture through sieve

• by evaporating the water from the mixture

• by letting the oil float to the top and skimming it off

A container holds a mixture of glass shards and iron filings. What is the best way to separate the glass shards from the iron filings?

• Use a magnet.

• Heat the mixture.

• Sort them by size.

• Separate them by shape.

Lucas has a mixture of playing pieces for a game, shown in the following picture.

Which is the best way for him to separate the mixture so each player has the correct pieces?

• by size

• by color

• by shape

• by density

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

• by size

• by shape

• by magnetism

• by evaporation

Tags

NGSS.MS-PS2-5

The following illustration shows a tool that can be used to separate elements of certain mixtures.

This tool can separate what type of mixture?

• a solution, such as salt water

• a mixture of particles with different densities

• a mixture of particles of different sizes, such as seashells and sand

• a mixture of magnetic and nonmagnetic items, such as steel and aluminum cans

Tags

NGSS.MS-PS2-3

The following illustration shows a tool that is used to separate certain mixtures.

This type of tool can be used to separate what type of mixture?

• a mixture that is a solution, such as salt water

• a mixture of particles of the same size with different densities

• a mixture of particles of different sizes, such as seashells and sand

• a mixture of steel, which is magnetic, and aluminum, which is not magnetic