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bio 121 exam 1 Questions with Correct Answers
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bio 121 exam 1 Questions with Correct Answers
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bio 121 exam 1 Questions with CorrectAnswers
include case studies - correct answers:
Easter Island Case Study - correct answers:Civilizations have fallen when population growth and
consumption overwhelm resource availability
Environmental Science - correct answers:the scientific study of:
How the natural world works
How the environment affects humans and vice versa
The pursuit of knowledge about the environment and our interactions with it
The Earth may seem enormous to us
But Earth and its systems are finite and limited
We can change Earth and damage its systems
environmental - correct answers:relating to the living and nonliving things around us
enviornment - correct answers:All the living and nonliving things around us (including people)
Living (biotic)
Non-living (abiotic)
Physical
Chemical
Together
science - correct answers:A systematic process for learning about the world and testing our
understanding of it
The body of knowledge arising from the dynamic process of observation, questioning, testing, and
discovery
,nature of science - correct answers:Descriptive (observational) science
Information is gathered about organisms, materials, systems, or processes not yet well known
Phenomena are observed and measured
Cannot be manipulated by experiments
Used in astronomy, paleontology, taxonomy, molecular biology, and genomics
Hypothesis-driven science
Structured research
Experiments test hypotheses using the scientific method
scientific method - correct answers:Observations lead to
Questions about some phenomenon
Hypothesis
A statement that tries to
answer the question
The hypothesis generates
Predictions
statements that can be tested (if, then statements)
Scientists Test predictions by conducting experiments
Scientists collect, record, and analyze Results
experiment - correct answers:Tests the validity of a prediction or hypothesis
Involves manipulating variables
controlled experiment - correct answers:- an activity designed so that the scientist controls for the
effects of all variables except for the one he/she is testing
variable
independent and dependent
treatment
,control
variable - correct answers:a condition that can change or be manipulated
independent variable - correct answers:The condition that the scientist manipulates in an experiment
dependent variable - correct answers:The resulting condition that depends on (is affected by) the
manipulation of the independent variable in the experiment
treatment - correct answers:A manipulated point of comparison
control - correct answers:An unmanipulated point of comparison
data - correct answers:the results
information gathered
data info gathered - correct answers:Data Types
Quantitative data - numerical
Qualitative data - non numerical
Representative Data
Not biased or selected
Random sample
data info gathered - correct answers:Analyze & interpret results
Statistical tests
May disprove or fail to disprove a hypothesis, but it never proves it to be true
Repetition is necessary
, If enough evidence accumulates to support the hypothesis, the scientist may eventually conclude that it
is well-supported
manipulative experiments - correct answers:The independent variable is manipulated
Reveal causal relationships
Provide the strong evidence
natural tests - correct answers:Compare how dependent variables are expressed in naturally different
contexts
Search for correlations among variables
Weaker evidence, but shows real-world complexity
Addresses immense-scale questions (i.e., ecosystems)
Long-term, large-scale processes can't be manipulated
graphs - correct answers:Graphs help to make patterns and trends in data visually apparent and easy to
understand.
The following four graphs each visualize data collected in a manipulative experiment testing the effect of
fertilizer on the growth rate of algae in a pond
Line graphs show trends in a variable over time.
Multiple lines can be used to show control and treated groups in an experiment.
Bar graphs compare single measurements between groups, such as average algae surface coverage.
Scatter plots reveal any correlations between two variables.
Pie charts show percentage breakdowns of a measurement, such as algae species.
scientific process continues beyond scientific method - correct answers:Peer review
Other scientists judge
the work
Conferences
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