Matter Review - Unit 1

It has been raining for several days. Overnight, the temperature dropped below the freezing point. Travel is now hazardous due to ice forming on the roadways.

This is an example of a —

• physical property

• chemical property

• physical change

• chemical change

Which of the following is considered to be a physical property of matter

• reactivity

• pH

• solubiliity

• toxicity

Which of the following is considered to be a chemical property of matter

• viscosity

• reactivity

• texture

• density

Which of the following equations is paired correctly with the type of change?

• Physical change: H2O (s) → H2O (l)

• Chemical change: NaCl (s) → Na (aq) + Cl (aq)

• Physical change: C6H12O6 (s) + 6 O2 (g) → 6CO2 (g) + 6 H2O (l)

• Chemical change: CO2 (s) → CO2 (g)

An object is observed to have a silver color and a metallic appearance. The object is also found to have a mass of 11.34 grams and melts at 327.46°C.

Of the observed properties listed below, which is considered to be an extensive property?

• silver

• metallic

• mass

• melting point

What type of property is density

• chemical property

• intensive property

• extensive property

• dependent property

What is an intensive property that can be measured?

• boiling point

• mass

• volume

• length

A lab technician is working on a sample of brass and testing its properties.

Which of the following properties of the brass is an extensive property?

• Melting Point: 920°C

• Melting Point: 920°C

• Mass: 62.9 g

• Reactivity: Dissolves in strong acid

Which state of matter has the greatest amount of kinetic energy?

• solid

• liquid

• gas

• varies according to the substance

Which statement best describes why a gas is easily compressible while most solids are incompressible?

• The molecules of a gas are much smaller than those of a solid.

• The molecules of a solid are not attracted to one another.

• The molecules of a gas are much further apart than those of a solid.

• The molecules of a solid are much larger than those of a gas.