What is the most important mistake on this graph?

The number scale on the y-axis is inconsistent

To improve the reliability of these results, the student should

repeat the experiment using a larger number of seeds

Conclusions based on an experiment are most likely to be accepted when they are

consistent with experimental data and observations

A valid inference based on these data is that

most photosynthetic organisms live above a depth of 150 cm

A biologist reported success in breeding a tiger with a lion. This will be accepted as fact if

other researchers can replicate the experiment

What would be a valid hypothesis for this experiment?

Removing potassium will affect plant growth

What is the relationship between the age of the mother and occurrence of Down's Syndrome?

As the age increases, the occurrence of DS increases

Which data should be collected to support this hypothesis?

diameter of the cotton bolls in both fields

Neither group reported a case of the flu. Which would have made the study more valid?

test a third group that does not receive the supplement

What is the purpose of the field without magnesium?

To compare the plants under normal conditions

Which statement is the best procedure to learn if a vaccine in a certain bird species is good?

Vaccinate half the birds and expose all 100 to the disease

What would the independent variable in this experiment?

Temperature of the seeds during growth

What other information should the student include in his experiment?

How fast the dogs at their normal food

Which of the following shows a bad procedure for testing white-tailed deer food preferences?

Observe four deer in different locations and times

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Experimental Design

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Reviewing for Regents- Scientific Method Unit

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Questions 19

Answers

1
What is the most important mistake on this graph?
The x-axis doesn't show the dates
The number scale on the y-axis is inconsistent
The points are connected
The title doesn't show the dependent variable
2
What is the dependent variable in this experiment?
0 - 0.05
Substrate Concentration
Rate of Reaction
Amount of Enzyme
3
To improve the reliability of these results, the student should
conclude that darkness is necessary for seed germination
revise the hypothesis
repeat the experiment using a larger number of seeds
conclude that light is necessary for seed germination
4
Conclusions based on an experiment are most likely to be accepted when they are
consistent with experimental data and observations
based on only one experimental design
testing only one hypothesis
from investigations having many experimental variables
5
The component missing from this experiment is a
hypothesis
control group
research plan
prediction
6
A valid inference based on these data is that
most photosynthetic organisms live above a depth of 150 cm
organisms move up to increase carbon dioxide production
oxygen increases as photosynthetic organisms move deeper
photosynthetic organisms respond to changing light levels
7
A biologist reported success in breeding a tiger with a lion. This will be accepted as fact if
other researchers can replicate the experiment
the offspring are given a scientific name
the biologist included a control in the experiment
research shows that other animals can be crossbred
8
What would be a valid hypothesis for this experiment?
Adding essential minerals will affect plant growth
Plants can grow well in flasks
Adding potassium will affect plant growth
Removing potassium will affect plant growth
9
The dependent variable in this experiment is the
age of participants in each group
pulse rate of each group
amount of soda given to each group
type of soda given to each group
10
What is the relationship between the age of the mother and occurrence of Down's Syndrome?
As the age increases, the occurrence of DS decreases
As the age increases, the occurrence of DS is constant
Age of the mother has no relationship with DS
As the age increases, the occurrence of DS increases
11
Which data should be collected to support this hypothesis?
diameter of the cotton bolls in both fields
height of the cotton plants in both fields
color of the cotton bolls in both fields
length of the growing season in both fields
12
Neither group reported a case of the flu. Which would have made the study more valid?
test a third group that does not receive the supplement
test on both groups for 5 weeks instead of 10 weeks
test a third group that receives 150 mg of the supplement
test only one group with 200 mg of the supplement
13
What information would be placed on the x-axis when graphing this information?
Number of Fish
Level of Dissolved Oxygen
Water Temperature
Amount of Algae
14
What is the purpose of the field without magnesium?
To test chemicals other than magnesium
To compare the plants under normal conditions
To understand the effect of water on the plants
To experiment is several different locations
15
Which statement is the best procedure to learn if a vaccine in a certain bird species is good?
Vaccinate half the birds, expose only those to the disease
Vaccinate 100 birds and expose half of them to the disease
Vaccinate half the birds and expose all 100 to the disease
Vaccinate 100 birds and expose all 100 to the disease
16
What would the independent variable in this experiment?
Height of the trees after time
Temperature of the seeds during growth
Number of seeds per tree
How far north or south each seed was planted
17
What other information should the student include in his experiment?
Age of the dogs
Color of the dogs
How fast the dogs at their normal food
If the dogs were indoor dogs or outdoor dogs
18
Which of the following shows a bad procedure for testing white-tailed deer food preferences?
Observe 500 deer in 20 different locations and times
Observe 300 deer in captivity, but none in nature
Observe four deer in different locations and times
Observe 200 deer in various settings, but none in captivity
19
What are the 3 parts of a hypothesis?
Claim, experiment, information
IF...THEN...BECAUSE
Claim, evidence, connections
IF...THEN...BUT

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