Intro to Biology Review
1. Carmen conducted an experiment to determine if listening to
different types of music would affect a person’s pulse. Her hypothesis
was that pulse rate would change with different types of music. Each
person listened to seven different selections of music for 30 seconds
each. Each person’s pulse was taken before the music and then after
each 30-second interval of music. The pulses were taken again after
the music selections were completed. Based on her experiment,
Carmen concluded that a person’s pulse rate changed when the person
listened to different types of music.
•
• Which component is missing from Carmen’s experiment?
• A. a question
• B. a hypothesis
• C. a control group
• D. a description of the experiment
2. The graph below shows atmospheric carbon dioxide levels since the year 1880.
Which of the following conclusions can be drawn from this graph?
A. Atmospheric carbon dioxide levels are responsible for global temperature change.
B. Atmospheric carbon dioxide levels have been rising at about the same rate for the
past century.
C. Atmospheric carbon dioxide levels have remained the same over the past century.
D. Atmospheric carbon dioxide levels have been rising at an increasingly higher rate
as the past century has progressed.
3. A scientist performs an experiment to see if
acids have an effect on the health of a
particular type of plant. Three sets of plants
were treated with acidic solutions of known pH
while the control set was treated with a
solution of neutral pH 7. Which is the best
conclusion for this experiment?
• A. Acid has no effect on the health of this
type of plant.
• B. High acidity is helpful to this type of
plant.
• C. Low acidity is harmful to this type of
plant.
• D. High acidity is harmful to this type of
plant.
4. A study was conducted to test which fertilizer (A,B, or C) is
most effective for the growth of St. Augustine’s grass over a 6
week time period. The following data was collected from the
study:
Numbered Plot of
Grass
Treatment Applied
Average of INITIAL
Height of Grass
(cm(=)
Average of FINAL
Height of Grass (cm)
1
Water
2.4
3.0
2
Fertilizer A
2.4
4.0
3
Fertilizer B
2.4
2.6
4
Fertilizer C
2.4
2.9
1.) What is not a constant in this experiment? (factor that is kept
the same)
2.) Why did the experimenters include one plot with water
treatment? What is this group called?
3.) What is a quantitative measurement? What is quantitatively
measured in this experiment?
5. Which of the following must be
written so that it is testable?
A.Scientific theory
B. Scientific law
C. Hypothesis
D.All of the above
6. What should you do if you are
working with a 100 mL beaker and you
notice a small crack?
A. Keep working, the crack isn’t big enough
for liquid to seep through
B. Hurry up and finish before the crack gets
larger
C. Immediately report the crack to the
teacher and wait for further instruction
D. Borrow a 100mL beaker from the group
sitting work next to you
7. Which of the following is known as an
“educated guess”?
A. Conclusion
B. Hypothesis
C. A Law
D. A theory
8. Which direction should a test tube
be facing when heating over an open
flame?
A. Slightly tilted pointing towards you
B. Slightly tilted pointing away from
you
C. Perfectly in the upright position
D. It doesn’t matter
9. Define the term “scientific law”
a. A possible explanation to a scientific question
b. An explanation that has been well tested and
unifies a broad range of observations
c. An explanation for why certain things exist
that can be tested to determine its accuracy.
d. Generalizes a body of observations, typically
math related.
10. How are theories developed?
a. By making observations with the
five senses
b. By thinking of one scientific
hypothesis
c. Through scientific predictions
d. Through many consistent and
supportable tests
11. Which of the following is
sometimes called the manipulated
variable?
a. Independent variable
b. Dependent variable
c. Control variable
d. Experimental variable
12. Which of the following is
sometimes called the responding
variable?
a.
b.
c.
d.
The independent variable
The dependent variable
The control variable
The experimental variable
13. Which of the following is the group
that the experimental group will be
tested against?
a. The responding variable
b. The experimental group
c. The control group
d. The constant group
14. Kimmy observes goldfish in an outdoor
pond. The goldfish seem to be more active
when the weather is warm than when it is
cold. She asks herself, “How do temperature
changes affect goldfish?
Task: Discuss the scenerio with your group and
create a hypothesis for Kimmy
15. According to the graph, what is
the height of Plant A at 21 days?
a.5 cm
b.9cm
c.11 cm
d.11 ft
16. Identify the lab equipment below
17. Identify the lab equipment below
18. Identify the lab equipment below
19. What piece of lab equipment
would you use to measure 10 g of
NaCl?
20. A research group has discovered that damselflies, a type of dragonfly, are being
infected by a particular type of aquatic protozoan. Both young and adult damselflies are
not directly infected by the protozoan but contract the infection from the prey they eat.
The graph shows the percentage of adult damselflies infected by protozoans during the
summer and early fall.
Which of the following conclusions is supported by the graph?
A. Infection in embanked ponds increased during the sampling period.
B. Protozoans were more common in creek-fed ponds than embanked ponds.
C. Protozoans reproduce more quickly in embanked ponds than creek-fed
ponds.
D. Infection in creed-fed ponds remained constant throughout the sampling
period.