NAS2 Challenge Exam# Questions and Answers with Verified Solutions

NAS2 Challenge Exam# Questions and
Answers with Verified Solutions
Purpose of Scientific Method - Correct Answer solve a problem or
Correct Answer a question



Question, Hypothesis, Experiment, Observe & Record, Analyze,
Conclude - Correct Answer steps of scientific method



Independent variable - Correct 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 - 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

,NAS2 Challenge Exam# Questions and
Answers with Verified Solutions
control group - Correct Answer does not receive treatment and used to
compare or measure the other subjects



experimental group - Correct Answer exposed to changes in
independent variable



anatomy - Correct Answer branch of science concerned with bodily
structure of living organisms; structure



physiology - Correct Answer science dealing with the functions of living
things or their organs



level of organization - Correct Answer living things arranged from the
simplest to most complex are:

organelle

cells

tissues

organs

, NAS2 Challenge Exam# Questions and
Answers with Verified Solutions
organ systems, organism

populations communities

ecosystem

biosphere



requirements for life - Correct Answer Cellular organization

Reproduction

Metabolism

Homeostasis

Heredity

Response to stimuli

Growth and development

Adaptation through evolution



survival needs - Correct Answer Food, oxygen, water, body
temperature, atmospheric pressure (oxygen/carbon dioxide exchange)