NAS2 CHALLENGE EXAM QUESTIONS AND ANSWERS 2025
Purpose of Scientific Method - (answer)solve a problem or answer a question
Question, Hypothesis, Experiment, Observe & Record, Analyze, Conclude - (answer)steps of scientific
method
Independent variable - (answer)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 - (answer)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 - (answer)does not receive treatment and used to compare or measure the other subjects
experimental group - (answer)exposed to changes in independent variable
anatomy - (answer)branch of science concerned with bodily structure of living organisms; structure
physiology - (answer)science dealing with the functions of living things or their organs
level of organization - (answer)living things arranged from the simplest to most complex are:
organelle
cells
tissues
organs
organ systems, organism
, NAS2 CHALLENGE EXAM QUESTIONS AND ANSWERS 2025
populations communities
ecosystem
biosphere
requirements for life - (answer)Cellular organization
Reproduction
Metabolism
Homeostasis
Heredity
Response to stimuli
Growth and development
Adaptation through evolution
survival needs - (answer)Food, oxygen, water, body temperature, atmospheric pressure (oxygen/carbon
dioxide exchange)
homeostasis - (answer)relatively constant internal physical and chemical conditions that organisms
maintain
receptor - (answer)senses environmental stimulus and sends info to control center
control center - (answer)hypothalamus
signals effector
effector - (answer)responds to stimuli
example: muscle contracting
Purpose of Scientific Method - (answer)solve a problem or answer a question
Question, Hypothesis, Experiment, Observe & Record, Analyze, Conclude - (answer)steps of scientific
method
Independent variable - (answer)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 - (answer)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 - (answer)does not receive treatment and used to compare or measure the other subjects
experimental group - (answer)exposed to changes in independent variable
anatomy - (answer)branch of science concerned with bodily structure of living organisms; structure
physiology - (answer)science dealing with the functions of living things or their organs
level of organization - (answer)living things arranged from the simplest to most complex are:
organelle
cells
tissues
organs
organ systems, organism
, NAS2 CHALLENGE EXAM QUESTIONS AND ANSWERS 2025
populations communities
ecosystem
biosphere
requirements for life - (answer)Cellular organization
Reproduction
Metabolism
Homeostasis
Heredity
Response to stimuli
Growth and development
Adaptation through evolution
survival needs - (answer)Food, oxygen, water, body temperature, atmospheric pressure (oxygen/carbon
dioxide exchange)
homeostasis - (answer)relatively constant internal physical and chemical conditions that organisms
maintain
receptor - (answer)senses environmental stimulus and sends info to control center
control center - (answer)hypothalamus
signals effector
effector - (answer)responds to stimuli
example: muscle contracting
