The illustration shows a tool that can be used to separate objects in certain mixtures. This tool can separate what type of mixture?

• a solution, such as salt water

• a mixture of particles with different weights

• 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.

There are three main states of matter: liquid, solid, and gas. Which statement describes the shape of a solid?

• It has its own shape

• It does not have shape.

• It takes the shape of its container.

• It can never change its shape.

Kyle and Jan are comparing two samples of matter. They make a table of the properties of each sample. Which property provides the best evidence that both samples are solids rather than liquids?

• color

• mass

• shape

• volume

The illustration shows a tool that is used to separate certain mixtures. This type of tool can be used to best separate what type of mixture?

• a mixture of sand and salt

• a mixture of particles of the same size

• 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

Matter may be a gas, solid, or liquid. It can change from one state to another. Which type of change most often causes a substance to change state?

• change in mass

• change in color

• change in volume

• change in temperature

Lorenzo is investigating the types of objects that a magnet attracts. He collects an assortment of coins, erasers, wires, nails, bottle caps, tacks, paper clips, and other small objects. Then, he records which ones are attracted to a magnet. For this investigation, which of these is a recorded observation that can be tested?

• The magnet attracts only objects made of iron or steel.

• Magnetic attraction can be observed but not measured.

• The magnet was not strong enough to attract all the objects.

• Magnets have many useful purposes at school and at home.