NAS2 Challenge Exam Questions and Answers (With Correct Solutions) Latest
Question : Purpose of Scientific Method
CORRECT ANSWER : solve a problem or answer a
question
Question : Question, Hypothesis, Experiment, Observe &
Record, Analyze, Conclude
CORRECT ANSWER : steps of scientific method
Question : Independent variable
CORRECT ANSWER : a variable that stands alone and isn't
changed by the other variables you are trying to measure,
change or controlledexample: age
Question : dependent variable
CORRECT ANSWER : a variable dependent on other
factors, tested or measured example: test score - factors that
go into a score you receive on a test
Question : control group
CORRECT ANSWER : does not receive treatment and used
to compare or measure the other subjects
Question : experimental group
CORRECT ANSWER : exposed to changes in independent
variable
Question : anatomy
CORRECT ANSWER : branch of science concerned with
bodily structure of living organisms; structure
Question : physiology
CORRECT ANSWER : science dealing with the functions of
living things or their organs
Question : level of organization
CORRECT ANSWER : living things arranged from the
simplest to most complex are:
organellecellstissuesorgansorgan systems, organismpopulations communitiesecosystembiosphere
Question : requirements for life
CORRECT ANSWER : Cellular
organizationReproductionMetabolismHomeostasisHeredityRe sponse to stimuliGrowth and developmentAdaptation through evolution
Question : survival needs
CORRECT ANSWER : Food, oxygen, water, body
temperature, atmospheric pressure (oxygen/carbon dioxide exchange)
Question : homeostasis
CORRECT ANSWER : relatively constant internal physical
and chemical conditions that organisms maintain
Question : receptor
CORRECT ANSWER : senses environmental stimulus and
sends info to control center
Question : control center
CORRECT ANSWER : hypothalamussignals effector
Question : effector
CORRECT ANSWER : responds to stimuli example: muscle contracting
Question : negative feedback mechanisms
CORRECT ANSWER : net effect is that the original output
of the system shuts off the original stimulus or reduces the intensityhomeostasis
Question : negative feedback mechanisms
CORRECT ANSWER : most common form of homeostasis,
bringing people back to normal functioning