Graph Analysis

How does a piece of paper’s ability to be folded in half compare to its ability to burn?

• A. Its ability to be folded is a physical property, while its ability to burn is a chemical property.

• B. Its ability to be folded is a chemical property, while its ability to burn is a physical property.

• C. Both are physical properties of the piece of paper.

• D. Both are chemical properties of the piece of paper.

A child fills a bucket with salt water and sand. When the bucket is left to sit, the sand settles to the bottom of the bucket. How are the contents of the bucket classified?

• a solution

• a compound

• a homogeneous mixture

• a heterogeneous mixture

A student added 10 mL of sodium chloride, NaCl, to 100 mL of water and then stirred the mixture until the salt was no longer visible. Which of the following BEST describes the mixture?

• Sodium chloride is the solute, water is the solvent, and salt water is the solution.

• Sodium chloride is the solute, salt water is the solvent, and water is the solution.

• Water is the solute, sodium chloride is the solvent, and salt water is the solution.

• Water is the solute, salt water is the solvent, and sodium chloride is the solution.

Which would most likely cause an increase in the energy of water molecules in liquid water?

• cooling the water

• boiling the water

• adding salt to the water

• putting the water into a larger container

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

How are the processes of melting and freezing similar?

• They are both processes that physically change a substance.

• They are both processes that chemically change a substance.

• They are both processes where heat is released by a substance.

• They are both processes where heat is absorbed by a substance

Tags

NGSS.MS-PS1-4

Which statement BEST describes the molecules in a sample of water that was heated from a liquid to a gas?

• The average size of the molecules decreased.

• The average size of the molecules increased.

• The average kinetic energy of the molecules decreased.

• The average kinetic energy of the molecules increased.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A student observed a sample of water in three states of matter. The student should describe the liquid water as a state of matter that has

• more kinetic energy than the solid state.

• more mass than the solid state.

• less kinetic energy than the solid state.

• less mass than the solid state.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-1

Which of the following is an example of a physical property?

• hammering gold into foil

• paper is flammable

• milk will sour

• fireworks explode

Which process is most effective for separating sodium chloride from a saltwater solution?

• filtration

• evaporation

• magnetic separation

• chemical separation

When water evaporates from Earth’s surface into the atmosphere, its molecules enter the gas state. What subsequent change causes gas molecules to condense into the small water droplets that form clouds?

• A. Mass is reduced.

• B. Volume is increased.

• C. Temperature is reduced.

• D. Pressure is increased.

Tags

NGSS.MS-PS1-4