What is the experimental group in Bernice’s investigation?

The normal watering regimen with fertilizer A.

Cats love fish more than dogs love fish.

This is not a good hypothesis because it is not testable.

When interpreting experimental results, scientists

use statistical analysis to see if differences are "real"

What is the control group in Bernice’s investigation?

The normal watering regimen without a fertilizer supplement.

has a large body of evidence; from many hypothesis tests

Bernice’s investigation is an example of a controlled experiment because

she treated all plants the same, except for the fertilizer treatment.

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Scientific Methodology

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Dependent/Independent variables, controls, etc. #scientific method #experiment

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Questions 13

Answers

1
What is the experimental group in Bernice’s investigation?
The normal watering regimen with fertilizer A.
The normal watering regimen without a fertilizer supplement.
The watering regimen.
Treating all plants the same, except for fertilizer.
2
Cats love fish more than dogs love fish.
This is not a good hypothesis because it is not testable.
This is a scientific theory.
Not a good hypothesis because it's not an if/then statement.
This is a good hypothesis.
3
What is the dependent variable?
The 20 plants
the amount of water
Fertilizer
Plant height
4
When interpreting experimental results, scientists
use only data that support their hypothesis.
say there is a significant difference if one value is larger
None of the above
use statistical analysis to see if differences are "real"
5
A placebo allows a control group to feel they are also receiving a treatment.
TRUE
FALSE
6
What is the control group in Bernice’s investigation?
The normal watering regimen with fertilizer A.
The watering regimen.
The normal watering regimen without a fertilizer supplement.
Treating all plants the same, except for fertilizer.
7
A scientific theory
is an idea as to how something might be done.
is a widely-shared opinion.
has a large body of evidence; from many hypothesis tests
is an explanation for natural phenomena that is proven.
8
Drinking coffee is associated with a lower risk of Parkinson disease. This is an example of
causation
correlation
9
Bernice’s investigation is an example of a controlled experiment because
she used 20 plants.
10 plants received fertilizer and the other 10 did not.
she treated all plants the same, except for the fertilizer treatment.
10
What is this SPECIFIC type of study called?
A survey of lifestyle habits.
A randomized clinical trial.
An epidemiological study.
11
What is the independent variable?
The 20 plants
Plant height
Fertilizer
The watering regimen
12
TRUE OR FALSE? Scientists rely upon anecdotal evidence to test hypotheses.
False
True
13
Regarding experimental design and confidence in data, a larger sample size is always better.
FALSE
TRUE

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