Matter Unit Test

Density is the ratio of mass to volume. Troy listed the density of four metals at 20 °C. If Troy has a 4-cm3 cube of each of these metals, which cube will have the most mass?

• brass

• gold

• iron

• lead

Tags

NGSS.MS-PS1-2

Which statement best describes volume?

• the measure of the amount of matter in an object

• the measure of the amount of matter in a given space

• the measure of the amount of space that an object occupies

• the measure of the amount of pull exerted on an object by a gravitational field

Amin had two metal cubes of identical sizes. He placed the first cube on one side of a pan balance and the second cube on the other side of the balance. The illustration below shows what happened. What conclusion can Amin draw about the two cubes?

• The weights of the cubes are the same.
• The volumes of the cubes are different.
• The masses of the two cubes are the same.
• The densities of the two cubes are different.

What is the density of a rectangular object if the mass is 125 grams?

• 125 g/cm3
• 80 g/cm3
• 0.64 g/cm3
• 1.6 g/cm3

Matter has two basic properties: physical properties and chemical properties. Which of these statements best describes physical properties?

• Physical properties behave identically for all matter under the same conditions.
• Physical properties can be observed without changing the identity of a substance.
• Physical properties are observed by seeing how a substance reacts with other substances.
• Physical properties cause atoms and molecules to change structure when substances are mixed.

A physical property can be observed or measured without changing the identity of a substance. Which of these choices is an example of a physical property?

• the tarnishing of silverware
• the texture of a piece of chocolate
• the effect of acid rain on automobiles
• the combustion of gasoline in a car engine

A chemical property is one that describes how matter can change its chemical nature. Which of these choices describes a chemical property?

• flammability—the ability to burn
• solubility —the ability to dissolve in a liquid
• malleability—the ability to change shape under pressure
• electrical conductivity—the ability to conduct electricity

All matter has physical and chemical properties. These properties can be used to identify the type of matter. Which of these pairs of properties are both chemical properties?

• green in color, soft
• shiny, soluble in water
• low density, very brittle
• not flammable, reacts with bases

Chemical changes result in new substances, but physical changes do not. Which process is an example of a physical change?

• Sodium and water are combined and form sparks.
• Oil and vinegar are mixed together and shaken.
• Peanut butter and jelly are digested with enzymes.
• Sodium and chlorine are combined to form table salt.

Sean fell while riding his green bicycle last year. He bent the fender and scratched the paint down to the metal. Sean’s bicycle was outside all winter and now is beginning to rust where the fender is damaged. Which evidence tells Sean that a chemical change is taking place on his bike?

• The paint is scratched.
• The metal fender is bent.
• The metal is beginning to turn orange.
• The bicycle sat in the weather all winter.

Tags

NGSS.MS-PS1-2