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NAS2 Challenge Exam Questions and
Correct Answers
Purpose of Scientific Method Ans: — solve a problem or answer a
question
Question, Hypothesis, Experiment, Observe & Record, Analyze,
Conclude Ans: — steps of scientific method
Independent variable Ans: — a variable that stands alone and isn't
changed by the other variables you are trying to measure, change
or controlled
example: age
dependent variable Ans: — a variable dependent on other factors,
tested or measured
example: test score - factors that go into a score you receive on a
test
control group Ans: — does not receive treatment and used to
compare or measure the other subjects
experimental group Ans: — exposed to changes in independent
variable
anatomy Ans: — branch of science concerned with bodily
structure of living organisms; structure
physiology Ans: — science dealing with the functions of living
things or their organs
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level of organization Ans: — living things arranged from the
simplest to most complex are:
organelle
cells
tissues
organs
organ systems, organism
populations communities
ecosystem
biosphere
requirements for life Ans: — Cellular organization
Reproduction
Metabolism
Homeostasis
Heredity
Response to stimuli
Growth and development
Adaptation through evolution
survival needs Ans: — Food, oxygen, water, body temperature,
atmospheric pressure (oxygen/carbon dioxide exchange)
© 2025 All rights reserved
NAS2 Challenge Exam Questions and
Correct Answers
Purpose of Scientific Method Ans: — solve a problem or answer a
question
Question, Hypothesis, Experiment, Observe & Record, Analyze,
Conclude Ans: — steps of scientific method
Independent variable Ans: — a variable that stands alone and isn't
changed by the other variables you are trying to measure, change
or controlled
example: age
dependent variable Ans: — a variable dependent on other factors,
tested or measured
example: test score - factors that go into a score you receive on a
test
control group Ans: — does not receive treatment and used to
compare or measure the other subjects
experimental group Ans: — exposed to changes in independent
variable
anatomy Ans: — branch of science concerned with bodily
structure of living organisms; structure
physiology Ans: — science dealing with the functions of living
things or their organs
© 2025 All rights reserved
, 2 | Page
level of organization Ans: — living things arranged from the
simplest to most complex are:
organelle
cells
tissues
organs
organ systems, organism
populations communities
ecosystem
biosphere
requirements for life Ans: — Cellular organization
Reproduction
Metabolism
Homeostasis
Heredity
Response to stimuli
Growth and development
Adaptation through evolution
survival needs Ans: — Food, oxygen, water, body temperature,
atmospheric pressure (oxygen/carbon dioxide exchange)
© 2025 All rights reserved
