Chapter 2: Properties of Matter

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 describes a physical property?

• whether or not a metal will rust
• the tendency of a substance to explode
• the way the substance reacts with water
• the shine or luster of a metal or other object

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 rate at which a metal transfers heat.
• the effect of acid rain on automobiles
• the combustion of gasoline in a car engine

The pictures below show four objects—a paper clip, a pair of scissors, a needle, and a horseshoe. Assume that each object is made of the same metal. Which of these physical properties is not similar in all four of these objects?

• mass
• magnetism
• specific heat
• electrical conductivity

Kavish mixes a black liquid and a clear liquid. He knows the two liquids do not mix well. Kavish allows the mixture to settle for 30 minutes. Which of these statements is true?

• The clear liquid is less dense than the black liquid.
• The clear liquid is less soluble than the black liquid.
• The clear liquid is less reactive than the black liquid.
• The clear liquid is less conductive than the black liquid.

Tags

NGSS.MS-PS1-2

All matter has physical and chemical properties. These properties can be used to identify the type of matter. Which of these statements describes a chemical property?

• A particular substance evaporates at 30 °C.
• A 2-ft.-long metal bar has a mass of only 176 g.
• A certain heavy metal turns to a liquid at room temperature.
• A metal is added to a beaker of water, and the beaker explodes.

Tags

NGSS.MS-PS1-2

To observe a chemical property, you must attempt to change its identity. Which of these statements describes an example of a chemical property?

• A silver statue begins to tarnish.
• A freshly waxed floor has a bright shine.
• A painter coats a building with red paint.
• A metal turns to liquid at a certain temperature.

Tags

NGSS.MS-PS1-2