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
, NAS2 CHALLENGE EXAM QUESTIONS AND ANSWERS 2025
organ systems, organism
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
, NAS2 CHALLENGE EXAM QUESTIONS AND ANSWERS 2025
organ systems, organism
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
