6th grade Science MP1 Review

Some students added a food coloring to a sample of liquid hexane and a different food coloring to a sample of glycerin. The students then poured the liquid hexane, some water, and the glycerin into graduated cylinder as shown below. Based on the drawing, which statement is a valid conclusion about the density of the three substances?

• Hexane is denser than water, and water is denser than glycerin.

• Glycerin is denser than water, and water is denser than hexane.

• Water is denser than hexane, and hexane is denser than glycerin.

• Water is denser than glycerin, and glycerin is denser than hexane.

Which statement best describes the motion of the molecules of a solid object?

• They move around freely within a fixed volume.

• They vibrate in place and take the shape of a container.

• They move around freely and take the shape of a container.

• They vibrate in place within a fixed volume.

Choose all the examples of chemical change.

• burning wood, rusting nail, exploding fireworks, baking cake

• burning wood, rusting nail, boiling water, melting butter

• slicing toast, boiling water, exploding fireworks, baking cake

• burning wood, rusting nail, grating a carrot, baking cake

The pull of gravity on Earth is caused by

• volcanoes erupting.

• Earth’s orbit around the Sun.

• the mass of Earth.

• air pressure.

Some students were studying different types of mixtures. They stirred together one cup of oil and one cup of water in a large glass beaker. They observed that the water settled to the bottom and the oil floated to the top. Which of the following does this investigation demonstrate?

• The oil completely mixed with the water.

• The oil maintained its physical properties.

• The oil caused the water to become more dense.

• The oil melts in water.

Based on these properties, which element is most likely a nonmetal?

• Element 1

• Element 2

• Element 3

• Element 4

Which statements correctly compare metals and nonmetals?

• Metals cannot be stretched into thin wires. Nonmetals can be stretched into thin wires.

• Metals tend to be good conductors of thermal energy. Nonmetals tend to be good insulators of thermal energy.

• Metals are good insulators of electricity. Nonmetals tend to be good conductors of electricity.

• Metals are dull and brittle. Nonmetals are shiny and malleable.

Beaker 1 contains salt water and Beaker 2 contains sugar water. Both beakers contain -

• solids

• gases

• elements

• homogenous mixtures

The motion of atoms is affected by temperature. The pictures show water at three different temperatures. Which shows the correct order of the pictures of increasing motion of water atoms?

• picture 1, picture 2, picture 3

• picture 1, picture 3, picture 2

• picture 2, picture 3, picture 1

• picture 3, picture 1, picture 2

Which type of matter can be separated by physical means?

• atom

• mixture

• compound

• element