A scientist tests the spectrum of color produced by light sources with a prism. Which variable should be held constant

the prism through which the light passes

Why are experiments designed to have as few variables as possible?

To narrow down what caused the change/result

A sports scientist is studying pulse rate&excercise. He has his team check their pusles before&after excerciese. Why?

serves as a control for the experiment

Which best describes a law

rue and universal.It has been tested and the outcome is the same each time.

Which of the following is an example of a scientist's physical model

A crash test dummy for a car company

Which condition is needed for an experiment to have useful data?

Similar results should be obtained when the experiment is repeated

Which statement most accurately describes scientific inquiry?

The data given from an experiment may be what people already know

which best describes tentative science

scientific results that have not undergone adequate testing &peer review.

Which best describes correlation

association between two or more events.

Graphs of the data from laboratory investigations are used to

observe general trends in the data

which best describes reliable science

consist of data, hypothesis, models theories&laws. They are peer reviewed

Why is having a large sample size important?

If a sample isnt large enough it can misrepresnt probability (measurement)

What is the first method of the scientific method?

observation and coming up with a question to an issue.

Which is one limitation of science

Scientists are not always free of bias

an independent variable is...

The variable you manipulate or is manipulated

Which statement about a rock sample is most likely an inference?

The rock has changed color due to weathering.

Which statement about a rock sample is an inference?

The rock was formed 100 million years ago.

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ENV unit 1

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Questions 26

Answers

1
A scientist tests the spectrum of color produced by light sources with a prism. Which variable should be held constant
the brightness of the spectrum
the prism through which the light passes
the colors produced by each light source
the light source used
2
Models used by scientists include
red and yellow (orange?)
Variable models
Physical Models
Conceptual models
3
If the results of your experiment do not support your hypothesis you should
D)Try another method
C)Find a way to rationalize your results
A)Publish your results anyway
B)Consider the results abnormal and continue working
4
Why are experiments designed to have as few variables as possible?
So scientists always remember things
They arent they need at least 50
To narrow down what caused the change/result
choose this if you arent paying attention (-10)
5
A sports scientist is studying pulse rate&excercise. He has his team check their pusles before&after excerciese. Why?
is needed to justify the sample size
serves as the conclusion for the experiment
is needed to formulate a hypothesis
serves as a control for the experiment
6
Which best describes a law
scientifically accurate&contain hypotheses but other variables affect it
Correlation=causation
association between two or more events.
rue and universal.It has been tested and the outcome is the same each time.
7
Which of the following is an example of a scientist's physical model
A diagram of the structure of an atom
A crash test dummy for a car company
a map of Denver Colorado
a satellite image of South America
8
Which condition is needed for an experiment to have useful data?
all of the above
Similar results should be obtained when the experiment is repeated
The hypothesis must be correct.
The experimental period must be short.
9
Which statement most accurately describes scientific inquiry?
It should never involve ethical decisions
It does not allow scientists to judge the reliability of their sources.
The data given from an experiment may be what people already know
It ignores information from other sources.
10
which best describes tentative science
consist of data, hypothesis, models theories&laws. They are peer reviewed
blue and green
Hasn't been peer reviewed, missing additional research/no clear conclusion
scientific results that have not undergone adequate testing &peer review.
11
Which best describes correlation
rue and universal.It has been tested and the outcome is the same each time.
Correlation=causation
association between two or more events.
scientifically accurate&contain hypotheses but other variables affect it
12
Graphs of the data from laboratory investigations are used to
make the observed data more accurate
help change the original data tables
prevent errors in measuring data
observe general trends in the data
13
which best describes reliable science
Hasn't been peer reviewed, missing additional research/no clear conclusion
scientific results that have not undergone adequate testing &peer review.
blue and green
consist of data, hypothesis, models theories&laws. They are peer reviewed
14
Why is having a large sample size important?
its not
It makes the experiment more complex
Scientists keep track of large things but always forget small things
If a sample isnt large enough it can misrepresnt probability (measurement)
15
What is the first method of the scientific method?
none of the above
observation and coming up with a question to an issue.
testable hypothesis
forming a conclusion
16
Which is one limitation of science
Scientific research can prove that any scientific theory is absolutely true
Many systems in the natural world involve a small number of variables
all of these
Scientists are not always free of bias
17
Which hobby do you think Mr. V DOESN'T do
Snowboarding
Hike mountains
rock climb
Roller blading
18
Variables are...
not important
always increasing
Factors of interest
19
Oscar studies magnetism&notices that a wire carrying an electric current affected a compass needle. This statement is
an inference
a hypothesis
a conclusion
an observation
20
a group of similar things that a scientist is interested in learning about.
Statistical population
Statistics
probability
Risk
21
an independent variable is...
The group that does not receive experimental treatment
The variable you manipulate or is manipulated
The variable that changes based on the independent variable
none of the above
22
The relative arrangement of the members of a statistical population.
mean
Distribution
Sample
collection
23
Where were the everglades located?
artic circle
Florida
Texas
Mr. Vs backyard
24
the collection and classification of data that are in the form of numbers.
probability
Statistics
Statistical population
Risk
25
Which statement about a rock sample is most likely an inference?
The rock has flat sides and sharp corners.
The rock has changed color due to weathering.
The rock is made of small, dark-colored crystals.
The rock has thin, distinct layers.
26
Which statement about a rock sample is an inference?
The rock scratches a glass plate.
A balance indicates the rock’s mass is 254 grams.
The rock was formed 100 million years ago.
The rock has no visible crystals and is red.

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