Unit 1 Review
What is a control group?
• You don’t have to have one in every experiment
• A control group is a group separated from the
rest of the experiment
• The independent variable being tested cannot
influence the results.
• This isolates the independent variable's effects on
the experiment and can help rule out alternate
explanations of the experimental results.
• Experiments that use control groups are called
controlled experiments.
Example
Experimental Question: “How does the addition of
fertilizer to plant soil affect plant growth?”
Design Experiment: Test two plants. One receives
fertilizer and the other does not. Compare results
Which is your control group?
= the plant that does not receive the fertilizer
• Experimental Question: “How does the
addition of fertilizer to plant soil affect plant
growth?”
•
•
•
•
Independent variable?
Dependent variable?
Constants?
Hypothesis?
Example
• Experimental Question: “How does the
presence of music affect plant growth?”
• Design Experiment:??
• Control group??
• Experimental Question: “How does the
presence of music affect plant growth?”
•
•
•
•
Independent variable?
Dependent variable?
Constants?
Hypothesis?
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?
Review
Ex: Who is the principal of Glasgow
High School?
A. Ms. Lynch
B. Mr. Hale
C. Mr. Vaught
D. Mrs. Wilson
Ex: Who is the principal of Glasgow
High School?
A.Mrs. Lynch
B. Mr. Hale
C. Mr. Vaught
D.Mrs. Wilson
1. 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
1. 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
2. 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
2. 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
3. Which of the following is known as an
“educated guess”?
A. Conclusion
B. Hypothesis
C. A Law
D. A theory
3. Which of the following is known as an
“educated guess”?
A. Conclusion
B. Hypothesis
C. A Law
D. A theory
4. 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
4. 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
5. 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. Meant to describe an action or
set of actions.
5. 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. Meant to describe an action or
set of actions.
6. 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
6. 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
7. Identify the statement below that is
an observation
a. Due to overfishing, extinctions in the ocean
are on the rise
b. If a young caterpillar is fed a diet high in
milkweed, then predators will avoid it as an
adult
c. Gardenia bushes are very fragrant
d. How fast can a cheetah run
7. Identify the statement below that is
an observation
a. Due to overfishing, extinctions in the ocean
are on the rise
b. If a young caterpillar is fed a diet high in
milkweed, then predators will avoid it as an
adult
c. Gardenia bushes are very fragrant
d. How fast can a cheetah run
8. Which of the following is sometimes
called the manipulated variable?
a. Independent variable
b. Dependent variable
c. Control variable
d. Experimental variable
8. Which of the following is sometimes
called the manipulated variable?
a. Independent variable
b. Dependent variable
c. Control variable
d. Experimental variable
9. 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
9. 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
10. 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
10. 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
11. 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
11. 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?
Possible hypothesis:
“If the temperature increases, then goldfish activity
will increase.”
OR
“If temperatures decrease, then goldfish activity
will decrease.”
12. Which of the following phrases
contains quantitative data?
a. Green leaves surround white flowers
b. Ricky’s football jersey is number 85
c. Seeds sprout more quickly when it is
warm
d. Water evaporates at a rate of 2 mL per
minute
12. Which of the following phrases
contains quantitative data?
a. Green leaves surround white flowers
b. Ricky’s football jersey is number 85
c. Seeds sprout more quickly when it is
warm
d. Water evaporates at a rate of 2 mL per
minute
13. What type of information does an
MSDS sheet not give you?
a. Chemical structure
b. Chemical properties
c. Personal safety
d. Fair market value
13. What type of information does an
MSDS sheet not give you?
a. Chemical structure
b. Chemical properties
c. Personal safety
d. Fair market value
14. In class Kelly placed her pencil on
the triple beam balance. What can
you infer about this?
a. She wanted to find the volume of the
pencil
b. She wanted to find the mass of the
pencil
c. She wanted to find the length of the
pencil
d. All of the above
14. In class Kelly placed her pencil on
the triple beam balance. What can
you infer about this?
a. She wanted to find the volume of the
pencil
b. She wanted to find the mass of the
pencil
c. She wanted to find the length of the
pencil
d. All of the above
15. Convert 68°F to Celsius
C= (F-32)
1.8
C = K – 273.15
F=1.8(°C) +32
K=C+273.15
15. Convert 68°F to Celsius
C= (F-32)
1.8
C = K – 273.15
= 20°C
F=1.8(°C) +32
K=C+273.15
16. Convert 18°C to °F
C= (F-32)
1.8
C = K – 273.15
F=1.8(°C) +32
K=C+273.15
16. Convert 18°C to °F
C= (F-32)
1.8
C = K – 273.15
= 64.4°F
F=1.8(°C) +32
K=C+273.15
17. Convert 100K to °C
C= (F-32)
1.8
C = K – 273.15
F=1.8(°C) +32
K=C+273.15
17. Convert 100K to °C
C= (F-32)
1.8
C = K – 273.15
= -173.15
F=1.8(°C) +32
K=C+273.15
18. Graduated cylinders are marked in
units of
a. liters
b. meters
c. millimeters
d. milliliters
18. Graduated cylinders are marked in
units of
a. liters
b. meters
c. millimeters
d. milliliters
19. A runner eats a large pasta dinner the night
before a race. In this example, which
characteristic of life is the runner using to help
her win the race?
a. All living things have cells
b. All living things reproduce and display
heredity
c. All living things evolve and adapt
d. All living things obtain and use energy
19. A runner eats a large pasta dinner the night
before a race. In this example, which
characteristic of life is the runner using to help
her win the race?
a. All living things have cells
b. All living things reproduce and display
heredity
c. All living things evolve and adapt
d. All living things obtain and use energy
20. Which of the following is a way that
organisms maintain homeostasis?
a. A damaged skin cell dividing into two newer
skin cells
b. A human shivering in the cold weather
c. A crow learning to retrieve a food reward in a
lab experiment
d. Finishes in the Galapagos developing different
types of beaks
20. Which of the following is a way that
organisms maintain homeostasis?
a. A damaged skin cell dividing into two newer
skin cells
b. A human shivering in the cold weather
c. A crow learning to retrieve a food reward in a
lab experiment
d. Finishes in the Galapagos developing different
types of beaks
21. Which of the following is not a
characteristic of life?
a.
b.
c.
d.
Reproduce and display heredity
Respond to stimuli
Maintain homeostasis
Are multicellular
21. Which of the following is not a
characteristic of life?
a.
b.
c.
d.
Reproduce and display heredity
Respond to stimuli
Maintain homeostasis
Are multicellular
22. 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
22. 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
23. Identify the lab equipment below
23. Identify the lab equipment below
Wash
Bottles
24. Identify the lab equipment below
24. Identify the lab equipment below
Striker
25. Identify the lab equipment below
25. Identify the lab equipment below
Micropipette *Can measure
liquids less than 1 mL
26. What piece of lab equipment
would you use to measure 10 g of
NaCl?
26. What piece of lab equipment
would you use to measure 10 g of
NaCl?
Balance
Triple Beam
Balance