Introduction To Matter Review Question Preview (ID: 35228)


Unit 7 Test Review. TEACHERS: click here for quick copy question ID numbers.

The length of a cube is 5 cm. What is the density of the cube if it's mass is 5 g?
a) 1 g/cm3
b) 25 g/cm3
c) 5 g/cm3
d) 0.2 g/cm3

According to Boyle's Law, when the pressure of a gas increases
a) the volume will decrease.
b) the temperature will increase.
c) the volume will increase.
d) the temperature will decrease.

Vinegar and baking soda combining to form a salt and wate
a) physical change.
b) heterogeneous mixture.
c) chemical change.
d) homogeneous mixture.

Which of the following formulas represent a molecule but not a compound? (assume the numbers are subscripts)
a) C6H12O6
b) He
c) H2O
d) O2

Which chemical formula represents a molecule and a chemical compound? (assume the numbers are subscripts)
a) H2O
b) O2
c) Pb
d) N2

Burning of methane gas produces water and carbon dioxide to cause a
a) chemical change.
b) physical change.
c) homogeneous mixture.
d) heterogeneous mixture.

Boiling point, melting point, and freezing point are all considered to be
a) chemical properties.
b) physical properties.
c) all the same temperature.
d) not important to phase changes.

Salt dissolving in a glass of water is known as a
a) chemical change.
b) physical change.
c) condensation.
d) recombination.

Sweet tea and lemonade would be considered
a) elements.
b) compounds.
c) homogeneous mixtures.
d) heterogeneous mixtures.

A pure substance that cannot be broken down chemically into another substance is known as
a) an element.
b) a compound.
c) a heterogeneous mixture.
d) a homogeneous mixture.

Sugar is an example of a(n)
a) element
b) compound
c) mixture
d) atom

Which phase change is exothermic?
a) melting
b) vaporization
c) condensation
d) sublimation

According to Charles' Law, when the temperature of a gas decreases
a) the pressure decreases as well.
b) the volume decreases as well.
c) the pressure increases.
d) the volume increases.

During sublimation
a) a solid turns to a liquid.
b) a gas turns to a solid.
c) a plasma turns to a gas.
d) solid turns to a gas.

If balloons exposed to hot hair expand, according to Charles' Law a balloon exposed to cold air will
a) increase in size.
b) stay the same size.
c) pop.
d) decrease in size.

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