Multiple Choice: Identify the
choice that best completes the statement or answers the question.
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1.
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The term biosphere refers to the parts of Earth that
contain
A | freshwater
environments. | C | land
masses. | B | living things. | D | greater biodiversity. |
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2.
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Which phrase best describes
Earth's biodiversity?
A | greater in consistently warm
areas | B | greater toward Earth's poles | C | greater according to energy
needs | D | greater where temperatures are most
variable |
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3.
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An individual living thing is
called a(n)
A | species. | C | atom. | B | cell. | D | organism. |
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4.
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Which of these characteristics
is shared by all living things?
A | They are made up of one or more
cells. | B | They make their own chemical energy. | C | They have similar responses to
light. | D | They reproduce when one cell divides into
two. |
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5.
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The basic unit of life
is
A | the
cell. | C | DNA. | B | an atom. | D | a species |
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6.
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Which of the following is NOT
an example of a biosphere?
A | windswept rocks in the
Aleutian | D | human
skin | B | pools of hot acidic water in a park | E | orchid | C | nose interior |
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7.
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Which word best describes a
scientific hypothesis?
A | provable | C | testable | B | theoretical | D | quantifiable |
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8.
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At which stage of scientific
inquiry would scientists find out if their hypotheses were supported by their
data?
A | observing | C | analyzing data | B | testing hypotheses | D | evaluating results |
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9.
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In an experiment, the condition
that is manipulated by a scientist is the
A | independent
variable. | C | constant. | B | dependent variable. | D | control condition. |
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10.
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Which of the following is an
important characteristic of a scientific theory?
A | proven by more than one
scientist | C | accepted by the
public | B | unchanged by new evidence | D | supported by much evidence |
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11.
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One way in which experimental
research differs from observational research is that only experimental research
can
A | test a
hypothesis. | C | support a
theory. | B | produce scientific results. | D | show cause and effect. |
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12.
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Which of the following safety
symbols tells you to wear safety goggles to protect your eyes?
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13.
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Which safety symbol tells you
not to let any poisonous chemical come into contact with your
skin, and not to inhale its
vapors?
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14.
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If a fire erupts,
immediately
A | notify the
teacher. | C | throw water on the
fire. | B | run for the fire extinguisher. | D | open the windows. |
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15.
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Horseplay, practical jokes, or
pranks in the classroom are
A | okay if you are working
alone. | C | okay. | B | not dangerous. | D | always against the rules. |
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16.
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Approved eye protection devices
(such as goggles) are worn in the laboratory
A | only if you do not have corrective
glasses. | C | any time
chemicals, heat, or glassware are used. | B | to avoid eye strain. | D | to improve your vision. |
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17.
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If a piece of equipment is not
working properly, stop, turn it off, and tell
A | the
principal. | C | your best friend
in the class. | B | your lab partner. | D | the teacher. |
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18.
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After completing an experiment,
all chemical wastes should be
A | left at you lab station for the next
class | C | dumped in the
sink | B | disposed of according to your teacher’s
directions | D | taken
home |
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19.
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When you finish working with
chemicals, biological specimens, and other lab substances, always
A | wipe your hands immediately on your
clothes. | B | wipe your hands as soon as possible on a
towel. | C | wash your hands thoroughly with soap and
water. | D | treat your hands with skin lotion to prevent your skin from
drying. |
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20.
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The following activity is
permitted in the laboratory:
A | drinking | C | chewing gum | B | eating | D | None of the
above. |
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21.
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You are heating a piece of
glass and now want to pick it up. You should
A | use
tongs. | C | pick up the end that looks
cooler. | B | pour cold water on it. | D | use a rag or paper towels. |
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22.
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The following footwear is
best in the
laboratory.
A | sandals | C | closed-toed shoes | B | open-toed shoes | D | all-weather shoes |
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23.
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The reason for wafting or
fanning a small amount of chemical vapors toward the nose as a means to detect odors in a test tube
is to —
A | avoid experimental error from
excessive loss of mass of reactants or products | B | avoid splashing chemicals into the face of any
person | C | protect the respiratory tract against potentially harmful
vapors | D | determine the relative strength of the odor before smelling
directly |
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24.
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Which of the following is the
safest procedure for diluting a strong acid or base
with water?
A | Pour the water directly into the
acid or base. | B | Pour the acid or base directly into the
water. | C | Pour the water down a stirring rod into the acid or
base. | D | Any of the above procedures is
acceptable |
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25.
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When dealing with a container
that has been heated, you should
A | hold the container in your
hand. | B | give it to your lab partner to hold. | C | hold the container with tongs or a safety
mitt. | D | touch it fi rst to see if it is already
hot. |
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26.
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Which of the following should
you NOT do when using an electrical apparatus?
A | Tie or tape its cords to your
workbench. | B | Use it away from wet areas. | C | Unplug it by holding the
plug. | D | Have its cords run across high-traffic
areas. |
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27.
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Excess chemicals from an
experiment should be
A | returned to their original storage
containers. | B | disposed of as directed by your teacher. | C | poured down the drain or thrown in the
wastebasket. | D | mixed together. |
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28.
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During an experiment with plant
materials, you should NOT do which of
the following?
A | Wear gloves when handling the plant
materials. | B | Wash any skin that comes into contact with the plant
materials. | C | Keep the different plant materials separate from one
another. | D | Touch your eyes after handling the
material. |
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29.
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If you spill a chemical, you
should
A | clean up the spill with a
sponge. | B | tell your lab partner to clean up the spill. | C | soak up the spill with paper towels and throw them in the
wastebasket. | D | tell the teacher. |
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30.
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The method for safely
determining the odor of a chemical is called
A | decanting. | C | wafting. | B | stirring. | D | inhaling. |
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31.
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You should not mix chemicals
together unless told to do so. Which choice is NOT a reason for this rule?
A | The mixture could splash out of the
container. | B | The mixture could produce a toxic gas. | C | The mixture could
explode. | D | The mixture could be poisonous. |
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32.
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If a liquid is infl ammable,
you should be sure to keep it
A | next to sources of
heat. | C | in the fume
hood. | B | away from heat or fl ames | D | near the sink. |
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33.
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Which of the following
precautions should you follow in the laboratory if you have long hair?
A | Long hair is not allowed in the
laboratory under any circumstances. | B | Be sure your hair is clean. | C | Tie your hair back from your
face. | D | No precautions are necessary with long
hair. |
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34.
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You should wear goggles in the
lab when you are working with.
A | chemicals. | B | flames. | C | objects that could become airborne. | D | all of the
above. |
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35.
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Before starting an
investigation, you should
A | read all the instructions and start
the lab even if you have questions. | B | try a procedure you think will work better. | C | try out the equipment so you know how it
works. | D | read all the instructions and ask your teacher if you have any
questions. |
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36.
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What is the first thing you should do if an accident occurs in your
classroom?
A | Find the emergency equipment. | B | Notify your teacher. | C | Go to the nearest
hospital. | D | Start first aid treatment. |
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37.
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Students are conducting an experiment to determine
if sugars are present in foods. They heat a test tube containing a sugar solution in a beaker of
water.
Which of these is an unsafe laboratory practice in this
experiment?
A | heating the sugar solution in a closed test
tube | B | rinsing hands with water after handling the
materials | C | using a test tube clamp to hold the test
tube | D | wearing safety goggles while heating the sugar
solution |
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38.
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Students will conduct a
laboratory experiment using the following materials: a Bunsen burner, a beaker of water, glass
tubing, four test tubes containing different chemicals, and rubber stoppers. Which of these steps is
most critical for students to follow when using these
materials in the lab?
A | wearing eye protection at
all times | B | writing the lab procedure in a notebook | C | washing hands before starting the
experiment | D | placing a stopper on all test tubes before heating
them |
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39.
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A scientist is
performing an investigation funded by a company. Which of these would be least likely to produce biased data?
A | using personal opinions to
decide the results of the research | B | using only the data that supports the
hypothesis | C | making the results please the company paying for the
research | D | being open minded and honest throughout the research
project |
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A student washes her hands with antibacterial
soap and water. Then she touches the agar in a petri dish with her thumb. The agar contains nutrients
that support the growth of bacteria. Other students repeat the procedure after washing their hands
with three different kinds of antibacterial soap. The petri dishes are kept warm overnight to allow
bacteria to grow. The next day the students count the number of bacterial colonies in each
dish.
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40.
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Which of these questions are the students most
likely trying to answer?
A | How long does it take soap to kill
bacteria? | B | Which soap is most effective in killing
bacteria? | C | Which nutrients are necessary to grow
bacteria? | D | How many bacteria are on the average
thumb? |
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41.
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What should be the effect of the soap in this experiment?
A | It should be toxic to the bacteria. | B | It should help the bacteria to
grow. | C | It should change the pH of the agar. | D | It should destroy the nutrientss in the
agar. |
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42.
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Cheryl wants to perform an investigation that
requires using hazardous chemicals. The following steps of the investigation are not in the correct
order.
1. Perform the investigation.
2.
Design the investigation.
3. Put on gloves, goggles, and an
apron.
4. Dispose of waste materials.
Which of these is the correct
sequence of steps to safely complete the investigation?
A | 1-3-4-2 | B | 3-2-1-4 | C | 4-1-3-2 | D | 2-3-1-4 |
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43.
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Which of these should be done before beginning a
laboratory investigation?
A | collect data | C | draw conclusions | B | review the procedure | D | record data on
table |
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44.
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Evidence suggests that bacteria supplied with a
cup of sugar could run a 60-watt light bulb for 17 hours.
Which of these was most likely used to affirm this scientific
idea?
A | formulate a hypothesis | C | conduct an experiment | B | identify the
problem | D | write a conclusion |
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Use the information below to answer the following questions.
Methyl
mercury is a toxic substance that can harm the nervous system. Some fish are contaminated with high
levels of methyl mercury. In many places, these fish are an important food source. Experiments are
being conducted to determine how many meals of contaminated fish can be safely consumed. The table
below shows the concentration of methyl mercury in the fish and the number of meals that can be
safely consumed per month.
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45.
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The data collected during this experiment are summarized in the graph
below.  The graph has been constructed incorrectly.
Which of these needs to be corrected in order to improve the graph? A | The axes are labeled with inappropriate intervals. | B | The dependent and
independent variables are on wrong axes. | C | The title is inconsistent with the
investigation. | D | One or both axes are missing units. |
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