7th Grade- Unit 7 Question Preview (ID: 35389)


Properties Of Matter. TEACHERS: click here for quick copy question ID numbers.

A tea bag is a type of ______________ because it allows water to pass through it while holding the tea leaves inside
a) magnet
b) filter
c) water treatment plant
d) solution

All substances have the same boiling point
a) true
b) false
c)
d)

This type of material conducts electricity
a) rubber
b) metal
c) non-metal
d) plastic

The formula for density is:
a) D= m + V
b) D= m x V
c) D= m / V
d) D= m - V

has fixed mass and fixed volume
a) solid
b) liquid
c) gas
d)

a stick of butter is considered frozen even if it has not been in the freezer (be ready to explain this is an essay)
a) true
b) false
c)
d)

Water changing from gas to liquid to solid and back to liquid
a) physical changes
b) chemical changes
c)
d)

To separate salt from a salt water mixture you would use
a) a magnet
b) a filter
c) boiling and evaportation
d) it is impossible to separate

which of these is not a sign of a chemical change?
a) an odor is produced
b) bubbles form
c) state of matter changes
d) temperature changes

when a sculptor shapes marble to make a statue it is a (be ready to explain why on the test)
a) chemical change
b) physical change
c)
d)

the process by which a solid becomes a liquid is called
a) condensation
b) freezing
c) melting
d) evaporating

the process by which liquid becomes a solid is called
a) boiling
b) freezing
c) melting
d) evaporating

the process by which a liquid becomes a gas is
a) evaporation
b) condensation
c) boiling
d) freezing

the process by which gas becomes a liquid is called
a) evaporation
b) condensation
c) freezing
d) boiling

the formation of rust on iron is a chemical change because
a) the color and shape have changed
b) the mass and volume have changed
c) the substance remains the same
d) a new substance has been formed

Dissolving sugar in water is an example of
a) physical change
b) chemical change
c) change in state
d) pressure change

color, shape, and texture are
a) physical properties
b) chemical properties
c) physical changes
d) chemical changes

Density describes the relationship between a substance's
a) matter and mass
b) mass and volume
c) volume and area
d) temperature and mass

is sharpening a pencil a physical or chemical change (be ready to explain in a short essay of the test)
a) physical change
b) chemical change
c)
d)

The density of water is 1.0 g/mL. Anything with a density less than 1.0 g/mL will float in water. the density of a spoiled egg is about 0.9 g/mL. If you place a spoiled egg in water, it floats. What does that tell you about the egg?
a) the egg is less dense than water
b) the egg is more dense than water
c)
d)

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