7th Grade- Unit 7 Question Preview (ID: 35389)
Properties Of Matter.
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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
Dissolving sugar in water is an example of
a) physical change
b) chemical change
c) change in state
d) pressure change
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
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
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)
Water changing from gas to liquid to solid and back to liquid
a) physical changes
b) chemical changes
c)
d)
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
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
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
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)
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)
This type of material conducts electricity
a) rubber
b) metal
c) non-metal
d) plastic
All substances have the same boiling point
a) true
b) false
c)
d)
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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