Classification Of Matter
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C HAPTER
Chapter 1. Classification Of Matter
1
Classification Of Matter
Worksheet
{{Teachers |body=
Name _____________________ Class ______________________ Date ________________
Answer each of the questions below to show your achievement of the lesson objectives.
Lesson Objective: Define a mixture and understand why mixtures are different than pure substances.
1. Which of the following is a pure substance
a.
b.
c.
d.
oxygen
air
salt water
maple syrup
2. One of the following is not a property of a mixture
a.
b.
c.
d.
always has the same composition
is a physical blend of two or more substances
each component retains its own identity
can be separated into components
3. True or False: Sodium chloride is a mixture of two elements.
4. True or False: A mixture can have more than two components.
5. Classify each of the following as either a mixture or a pure substance:
a.
b.
c.
d.
orange juice ___________
paper ____________
nitrogen _______________
blood __________________
Lesson Objective: Classify mixtures as homogeneous or heterogeneous.
6. Which of the following is a homogeneous mixture?
a.
b.
c.
d.
crunchy peanut butter
pepperoni and mushroom pizza
a glass of root beer
macaroni and cheese
7. A phase has all of the following characteristics except one
a.
b.
c.
d.
uniform composition
properties are the same throughout
is always a pure substance
can be a gas or a liquid
8. Only one of the following is a characteristic of a heterogeneous mixture
a. composition is uniform throughout the mixture
b. contains two or more phases
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c. is a pure substance
d. the mixture composition is always the same
9. True or False: Oil and water always mix evenly.
10. True or False: A heterogeneous mixture consists of two or more phases
11. Identify each of the following as either a homogeneous or a heterogeneous mixture.
a.
b.
c.
d.
motor oil _______________
sand __________________
sawdust _________________
milk __________________
Lesson Objective: Describe several ways to separate mixtures.
12. Distillation could not be used to separate one of the following:
a.
b.
c.
d.
rubbing alcohol and water
motor oil and brake fluid
sand and gold
gasoline fractions
13. The best way to separate lead pellets from ginger ale is
a.
b.
c.
d.
14.
15.
16.
17.
hand-pick all the pellets
distillation
filtration
melt the lead
True or False: Distillation separates materials based on melting point.
True or False: Hot water is used to cool a distillation column.
Read the passage below and answer the following questions
Sand does not dissolve in water. In order to separate sand from water, the mixture can be poured through a
filter. The tiny holes of a filter, called pores, allow the water to pass through while trapping the sand grains
behind. Filtration is a technique that separates solids from liquids in a heterogeneous mixture. Distillation is
a method of separating a mixture based on differences in boiling points. A small-scale laboratory distillation
apparatus is used to separate substances based on differences in their boiling points. For example, the impure
liquid could be a mixture of alcohol and water. As the mixture is heated, the alcohol begins to boil before the
water does because of its lower boiling point. The alcohol vapors rise up in the flask and into the long
cylindrical tube, which is called a condenser. Cold water is continually pumped into the outside of the
condenser, which causes the alcohol vapors to condense back into the liquid state. The purified alcohol then
drips into the flask labeled “distilled liquid,” while the water is left behind in the original flask. Distillation is
commonly used to purify water by separating it from the various dissolved minerals that are found in natural
water sources.
a. Distillation is based on what physical property? _____________
b. In a mixture of acetone (boiling point 132°C) and ethanol (78°C), which component will distill off first?
_______________
c. What will happen to the components if the mixture is placed in an oven at 200°C?
Lesson Objective: Distinguish between elements and compounds.
17. Only one of the following is not a characteristic of a compound
a.
b.
c.
d.
2
composed of two or more elements
cannot be broken down into simpler substances
an undergo chemical changes
elements are combined in fixed proportions
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Chapter 1. Classification Of Matter
18. The symbol Cu designates the element
a.
b.
c.
d.
copper
lead
mercury
cobalt
19. Antimony has the following chemical symbol:
a.
b.
c.
d.
Au
Ag
Sb
Sn
20. The Latin name for tin is
a.
b.
c.
d.
21.
22.
23.
24.
25.
26.
27.
natrium
kalium
stibium
stannum
True or False: The chemical symbol for potassium is K.
True or False: The symbol Fe is used to represent the element lead.
True or False: A chemical symbol for an element can have one or two letters.
True or False: A specific chemical symbol can be used to designate more than one element.
Would you rather have jewelry made of argentum or natrium? ____________
The two elements found in a mixture of aurum and plumbum are ________________ and _______________.
You have a mixture of potassium chloride, water, and olive oil. How would you separate these materials from
one another?
3