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20 questions
Matter that has exactly the same composition.
pure substance
mixture
suspension
colloid
Which of the following are pure substances?
elements
mixtures
compounds
solutions
Always contains two or more elements joined in a fixed proportion.
solution
element
compound
mixture
A pure substance with only one kind of atom.
compound
homogeneous mixture
element
solution
Gold is an example of a(an)...
heterogeneous mixture
compound
homogeneous mixture
element
Chocolate chip cookie dough is an example of a(an)...
heterogeneous mixture
compound
homogeneous mixture
element
Saltwater is an example of a(an)...
solution
element
compound
heterogeneous mixture
A solution is a type of homogeneous mixture.
True
False
Water is classified as a(an)...
solution
element
compound
mixture
Particles dissolved in a solution can be separated using a filter.
True
False
Which of these substances is not an element?
water
hydrogen
aluminum
iron
Tap water is
an element
a compound
a substance
a mixture
When a homemade oil-and-vinegar salad dressing is left standing, it separates into layers. The salad dressing is a
solution
suspension
colloid
compound
Which of the following is not an example of a physical property?
density
flammability
hardness
melting point
Which material is a poor conductor of heat?
iron
silver
wood
copper
A material that can be hit without shattering is
viscous
flammable
malleable
hard
At room temperature, a substance with a melting point of 40 degrees C is a
solid
liquid
gas
mixture
Which action involves a chemical change?
making ice cubes
adding sugar to tea
cutting wrapping paper
baking a cake
A substance that has little tendency to change into other substances is said to have low
reactivity
density
viscosity
conductivity
Formation of a precipitate is usually evidence of
the separation of a mixture
a chemical change
the formation of a mixture
a physical change
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