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