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Matter Re-Take

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

The chemical element that is most abundant in the human body is
a.
nitrogen.
c.
carbon.
b.
iron.
d.
oxygen.
 

 2. 

A molecule of water (H2O) is made from _____ combining two hydrogen atoms and one oxygen atom.
a.
physically
c.
thermally
b.
ionically
d.
chemically
 

 3. 

You put 1 spoonful of salt into 1 liter of water and stir. The resulting liquid is an example of a(n)
a.
pure substance.
c.
heterogeneous mixture.
b.
homogeneous mixture.
d.
immiscible mixture.
 

 4. 

A material that can be represented by a chemical formula is
a.
an element.
c.
a homogeneous solution.
b.
a mixture.
d.
a pure substance.
 

 5. 

The chemical formula for water, H2O, means that each water molecule contains
a.
two hydrogen atoms and two oxygen atoms.
b.
two hydrogen atoms and one oxygen atom.
c.
two hydrogen atoms and zero oxygen atoms.
d.
one hydrogen atom and two oxygen atoms.
 

 6. 

Lead has a density of 11.3 g/cm3 and a mass of 282.5 g. What is its volume?
a.
2.5 cm3
c.
250 cm3
b.
25 cm3
d.
2500 cm3
 

 7. 

Which of the following is not a potential sign of chemical change?
a.
release of gas
c.
change of color
b.
evaporation of water
d.
production of gas
 

 8. 

The smallest unit of an element that maintains the properties of that element is a(n)
a.
molecule.
c.
substance.
b.
atom.
d.
compound.
 

 9. 

Solids, liquids, and gases are three forms of matter that
a.
take up space.
c.
are made of atoms.
b.
have mass.
d.
All of the above
 

 10. 

How many atoms are in a single molecule of Fe2O3?
a.
2
c.
5
b.
3
d.
6
 

 11. 

Which of the following is not a pure substance?
a.
element
c.
compound
b.
molecule
d.
mixture
 

 12. 

Which of the following is an element?
a.
salt
c.
nylon
b.
iron
d.
sand
 

 13. 

A group of atoms that acts as a unit is called a(n)
a.
mixture.
c.
element.
b.
molecule.
d.
compound.
 

 14. 

Diamond is known for its
a.
hardness.
c.
reactivity.
b.
flammability.
d.
All of the above
 

 15. 

What is the density of a sample of liquid that has a volume of 125 mL and a mass of 200 g?
a.
75 g/mL
c.
1.6 g/mL
b.
16 g/mL
d.
0.625 g/mL
 

 16. 

Helium is used in balloons because it is
a.
reactive with rubber.
c.
flammable.
b.
lighter than air.
d.
a colored gas.
 

 17. 

A chemical property of copper is its
a.
density.
c.
color.
b.
reactivity.
d.
melting point.
 

 18. 

A physical property of gold is its
a.
density.
c.
nonflammability.
b.
reactivity with powerful acids.
d.
None of the above
 

 19. 

The mass of a 20 L sample of gas with a density of 0.04 mg/L is
a.
0.08 mg.
c.
8 mg.
b.
0.8 mg.
d.
80 mg.
 

 20. 

Aluminum is used in kitchen foil because it is
a.
very heavy.
c.
shiny.
b.
hard to bend.
d.
None of the above
 

 21. 

An object’s volume can be found by dividing its mass by its
a.
pressure.
c.
density.
b.
temperature.
d.
weight.
 

 22. 

Which of the following is not a physical property of iron?
a.
melting point
c.
color
b.
ability to rust
d.
conductivity
 

 23. 

Which property of a substance is not affected by physical changes?
a.
reactivity
c.
shape
b.
size
d.
position
 

 24. 

The different substances in a mixture
a.
keep their properties.
c.
form new molecules.
b.
combine chemically.
d.
cannot be separated.
 

 25. 

Which of the following is not a potential sign of chemical change?
a.
change in odor
c.
change in color
b.
fizzing
d.
boiling
 

 26. 

How can a chemical change be reversed?
a.
by chemical changes
b.
by physical changes
c.
by both chemical and physical changes.
d.
None of the above
 

 27. 

Which of the following causes a chemical change?
a.
moving
c.
burning
b.
shattering
d.
melting
 

 28. 

Which of the following results in a mixture?
a.
baking a cake
c.
dissolving salt
b.
burning a log
d.
digesting food
 

 29. 

A chemical change occurs whenever
a.
substances are mixed.
c.
hot objects melt.
b.
objects change shape.
d.
new substances form.
 

 30. 

Which tool is best for separating a mixture of sand and water?
a.
tweezers
c.
centrifuge
b.
magnet
d.
filter
 

 31. 

Which of the following is a physical change?
a.
dissolving
c.
bending
b.
evaporating
d.
All of the above
 

 32. 

Chemical changes can affect physical and chemical properties whereas physical changes can affect
a.
chemical properties.
b.
physical properties.
c.
both chemical and physical properties.
d.
None of the above
 

 33. 

Matter is defined as anything that
a.
can be seen and touched.
c.
can be weighed.
b.
has mass and takes up space.
d.
contains kinetic energy.
 

 34. 

The smallest unit of a substance that behaves like the substance is a(n)
a.
element
c.
atom
b.
molecule
d.
compound
 

 35. 

The chemical symbol for sulfuric acid is H2SO4. How many atoms are contained in each molecule of sulfuric acid?
a.
3
c.
6
b.
5
d.
7
 

 36. 

Which of the following is an example of a gas-liquid mixture?
a.
the air we breathe
c.
a carbonated drink
b.
a helium balloon
d.
ice cubes
 

 37. 

Which of the following is an element?
a.
steel
c.
iron
b.
bronze
d.
brass
 

 38. 

Which of the following is made of at least two different types of atoms?
a.
element
c.
compound
b.
molecule
d.
matter
 

 39. 

Unlike a mixture, a pure substance has
a.
atoms
c.
a specific size.
b.
molecules
d.
a fixed composition.
 

 40. 

Which of the following is not an example of a physical property?
a.
freezing point
c.
boiling point
b.
reactivity
d.
density
 

 41. 

A substance has a mass of 360 g and a volume of 7.5 mL. What is its density?
a.
2,700 g/mL
c.
270 g/mL
b.
480 g/mL
d.
48 g/mL
 

 42. 

Stainless steel has chemical properties such as
a.
hardness.
c.
high melting point.
b.
resistance to rust.
d.
electrical conductivity.
 

 43. 

Which of the following is an example of a chemical change?
a.
ice melting
c.
paint fading
b.
pounding gold into a coin
d.
a puddle of water evaporating
 

 44. 

Digesting food is an example of
a.
physical change.
c.
change of state.
b.
chemical change.
d.
buoyancy.
 

 45. 

The science of what matter is made of and how it changes is called
a.
chemistry.
c.
kinetics.
b.
physics.
d.
engineering.
 

 46. 

A substance that cannot be broken down into simpler substances is a(n)
a.
compound.
c.
element.
b.
mixture.
d.
atom.
 

 47. 

The chemical formula for table sugar is C12H22O11. How many oxygen atoms are in each sugar molecule?
a.
2
c.
12
b.
11
d.
22
 

 48. 

You put a spoonful of salt into 1 liter of water and stir. The resulting liquid is an example of a(n)
a.
pure substance.
c.
heterogeneous mixture.
b.
homogeneous mixture.
d.
immiscible mixture.
 

 49. 

Which of the following is an example of a chemical property?
a.
reactivity with oxygen
c.
density
b.
solubility in water
d.
color
 

 50. 

Which of the following is not an example of a physical property?
a.
freezing point
c.
boiling point
b.
reactivity
d.
density
 

 51. 

Knowing the chemical properties of a substance will tell you how the substance
a.
looks.
c.
smells.
b.
can be broken down into atoms.
d.
reacts with other substances.
 

 52. 

Steel has a density of 7.8 g/cm3. What is the mass of a block of steel with a volume of 600.0 cm3?
a.
77 g
c.
470 g
b.
4,700 g
d.
7,700 g
 

 53. 

Which of the following is an example of a physical change?
a.
dissolving salt in water
c.
burning wood into charcoal
b.
cooking an egg
d.
rusting iron
 



 
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