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Scientific Method Flashcards | StudBud
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Scientific Method
Scientific Method
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1
Planaria (type of worm) is affected by the presence of light. What is the IV?
Same number of planaria
Movement towards or away from light source
Presence of light
No light
2
Different pH levels may affect the rate of tooth decay. What is the Control?
Tooth's mass (or weight)
pH 2, 4, 9, and 12
Neutral pH
Same type of tooth
3
Planaria (type of worm) is affected by the presence of light. What is the DV?
Presence of light
Movement towards or away from light source
No light
Same number of planaria
4
It's hypothesized increased atm. pollution is linked to salamander pop. reduction. What is DV?
Amount of pollution
Salamander species
Salamander pop. size
Type of pollution
5
Different pH levels may affect the rate of tooth decay. What is the DV?
Neutral pH
Same type of tooth
Tooth's mass (or weight) / amount of decay
pH 2, 4, 9, and 12
6
Alcohol concentration in cleaning product may affect bacterial reproduction. What is the DV?
amount of alcohol in cleaning product
no alcohol used
size of bacterial colony
non-alcoholic cleaning products
7
High salt diet is linked to heart disease. In an experiment, what is the DV?
Blood pressure measurement
Amount of water
Type of food
Amount of salt in food
8
If you want credit for work, what should you do? (think of Alfred Wallace & Rosalind Franklin)
Publish first
Publish with a group
Money, money, money
Analyze the results accurately
9
High salt diet is linked to heart disease. In an experiment, what is the IV?
Blood pressure measurement
Amount of water
Type of food
Amount of salt in food
10
Is seed germination affected by overcrowding? What is the Control Group?
type of seed
one seed planted in each pot
the number of seeds that germinated
number of seeds planted in a pot or soil
11
Is seed germination affected by overcrowding? Which is NOT a Constant in the experiment?
number of seeds
amount of sunlight and water
size of planting pot/container
same type of plant (seed)
12
Planaria (type of worm) is affected by the presence of light. What is the Control?
Presence of light
No light
Movement towards or away from light source
Number of planaria
13
What is the comparison group to show if the IV caused any changes in an experiment?
Experimental group
Dependent variable
Control group
Independent variable
14
Which of the following is the first step of the Scientific Method?
If Vitamin C levels are high, chemotherapy is less effective
Cancer patients should avoid citrus during treatment
Do certain food interfere with chemotherapy?
High levels of Vitamin C causes an increase in cancer cell #
15
This statement, "plants will grow at faster under green light than white light" is a .......
Hypothesis
Constant
Conclusion
Experimental variable
16
Different pH levels may affect the rate of tooth decay. What is the IV?
Neutral pH
Tooth's mass (or weight)
Same type of tooth
pH 2, 4, 9, and 12 (diff. pH levels)
17
Alcohol concentration in cleaning product may affect bacterial reproduction. What is the IV?
no alcohol used
size of bacterial colony
growth rate of bacteria
amount of alcohol in cleaning product
18
Is seed germination affected by overcrowding? What is the Independent Variable?
the number of seeds that germinated
type of seed
one seed planted in each pot
number of seeds planted in a pot or soil
19
Is seed germination affected by overcrowding? What is the Dependent Variable?
number of seeds planted in a pot or soil
one seed planted in each pot
the number of seeds that germinated or grew
type of seed
20
Every experiment will need a _______ for valid results. Pick the best answer.
Independent variable
Constants
Dependent variable
Control
21
In the U.S., skin cancer occurs on the left side of face at higher rate. Best research source?
Biology textbook
Newspaper
Wikipedia
Scientific Journal on Disease
