WorksheetsClassifying Matter (Section 2.1)
Total questions: 43
Worksheet time: 22mins
What is a pure substance?
Matter that always has exactly the same composition
Matter that can be broken down into simpler substances
Matter that contains more than one type of atom
Matter that changes composition frequently
Which of the following are examples of pure substances?
A) Table salt and table sugar
B) Air and water
C) Aluminum and carbon
D) Oxygen and nitrogen
Substances can be classified into two categories: ______ and ______. (Fill in the blanks)
elements, compounds
atoms, molecules
solids, liquids
mixtures, solutions
An element is a substance that cannot be ______.
broken down into simpler substances
combined with other substances
measured in grams
found in mixtures
Each element contains only ______ type of atom.
one
two
three
many
Which of the following is NOT true about elements?
A) Each element contains only one type of atom
B) Elements can be broken down into simpler substances
C) No two elements contain the same type of atom
D) Elements have symbols that use one or two letters
At room temperature, which of the following are liquids?
Bromine and mercury
Oxygen and nitrogen
Aluminum and carbon
Gold and silver
Symbols for elements use ______ or ______ letters.
one, two
three, four
two, three
four, five
A compound is made from ______ and can be ______.
two or more simpler substances, broken down
one element, created
three or more atoms, dissolved
a single atom, combined
Water (H2O) is made of ______ and ______. (Fill in the blanks)
hydrogen, oxygen
carbon, oxygen
hydrogen, nitrogen
carbon, nitrogen
Which of these is a compound?
Water
Cm
Sand
Iron
Which symbol represents an element?
Water
Cm
Sand
Stainless steel
Which statement does *not* apply to a compound?
It can be separated into components by physical methods.
It is made up of two or more elements chemically combined.
It has properties different from its constituent elements.
It has a fixed composition.
A compound differs from a mixture because
a compound is made of two or more elements in fixed proportion.
a compound can be separated by physical means.
a compound has variable composition.
a compound is always a liquid.
Which of these is a heterogeneous mixture?
sand
salt water
air
vinegar
Which mixture can be separated by a filter?
suspensions
solutions
alloys
colloids
Which is *not* a physical property?
density
boiling point
flammability
conductivity
Which material is not malleable?
copper
aluminum
glass
gold
In choosing a material for electric wire, the most important property is
conductivity
density
malleability
hardness
Which statement best describes a physical change?
Substance changes into one or more new substances.
Some properties change, but the material remains the same.
Properties do not change, material remains the same.
Substance is separated into simpler substances.
Filtration separates substances based on boiling points.
True
False
What is the definition of viscosity?
The tendency of a liquid to keep from flowing.
The ability of a liquid to evaporate quickly.
The property of a liquid to conduct electricity.
The tendency of a liquid to freeze at low temperatures.
Which of the following are examples of high viscosity?
Vinegar and water
Corn syrup and honey
Gold and silver
Which of the following are examples of low viscosity?
a) Corn syrup and honey
b) Vinegar and water
c) Gold and silver
What is the definition of conductivity?
A material's ability to allow heat to flow.
A material's ability to reflect light.
A material's ability to dissolve in water.
A material's ability to resist force.
Materials with high conductivity are called ________.
conductors
insulators
semiconductors
resistors
Good conductors of heat are usually also good conductors of ________.
electricity
light
sound
magnetism
What is the definition of malleability?
The ability of a solid to be hammered without shattering.
The ability of a material to conduct electricity.
The ability of a substance to dissolve in water.
The ability of a material to resist scratching.
Which of the following is an example of a malleable material?
Gold
Glass
Corn syrup
Materials that shatter when struck are called ________.
brittle
ductile
malleable
flexible
What is the rule for hardness?
One material can scratch another if it is harder.
One material can melt another if it is harder.
One material can dissolve another if it is harder.
One material can bend another if it is harder.
What is the hardest known material?
Gold
Diamond
Iron
Silver
What is the temperature at which a solid turns to liquid called?
Melting point
Boiling point
Freezing point
Condensation point
What is the temperature at which a liquid turns to gas called?
Boiling point
Freezing point
Melting point
Condensation point
Which of the following are liquids at room temperature (20°C)?
Octane
Water
Acetic acid
All of the above
What is the formula for density?
mass ÷ volume
volume ÷ mass
mass × volume
mass + volume
Density can be used to test the ______ of a substance.
purity
color
temperature
volume
Which step is NOT part of identifying materials?
A) Deciding which properties to test
B) Ignoring the sample
C) Testing a sample
D) Comparing results with known materials
Filtration uses ______ differences to separate mixtures.
particle size
color
temperature
density
Distillation uses differences in ______ to separate mixtures.
boiling points
melting points
density
color
A physical change occurs when some of the properties of a material change, but the substances remain the same.
True
False
Which of the following is an example of a reversible physical change?
Cutting hair
Braiding hair
Melting butter
Slicing a tomato
Which of the following is an example of an irreversible physical change?
Braiding hair
Cutting hair
Crumpling a piece of paper
Melting butter
