biology ch 1
Post on 11-May-2015
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BIOLOGYBIOLOGY
The Study of The Study of LifeLife
Bio = LifeBio = Life Logy = Study ofLogy = Study of
OrganismOrganism
Anything that possesses all of the Anything that possesses all of the characteristics of life.characteristics of life.
All living things:All living things:
have an orderly have an orderly structure (made of structure (made of cells)cells) produce offspringproduce offspring
grow and developgrow and develop
adjust to changes in the environment adjust to changes in the environment (Adapt)(Adapt)
Characteristics of Living ThingsCharacteristics of Living Things
SpeciesSpecies
A group of organisms that can interbreed A group of organisms that can interbreed and produce and produce fertilefertile offspring in nature. offspring in nature.
Hypothesis Vs. TheoryHypothesis Vs. Theory
HypothesisHypothesis: An : An explanation for a explanation for a problem that can problem that can be tested by be tested by experimentation. experimentation.
(An educated (An educated guess, what you guess, what you think will think will happen)happen)
TheoryTheory: Has : Has been tested been tested repeatedly by repeatedly by experimentation experimentation and has been and has been proven to be proven to be true.true.
TheoryTheory
Can a theory ever be proven Can a theory ever be proven wrong??wrong??
YESYES
Scientific MethodScientific Method
Steps used to gather information Steps used to gather information and solve problems.and solve problems.
7 Steps7 Steps
1. Observe a problem.1. Observe a problem. 2. Collect information2. Collect information 3. Develop a hypothesis.3. Develop a hypothesis. 4. Experiment4. Experiment 5. Collect and analyze data5. Collect and analyze data 6. Form a conclusion.6. Form a conclusion. 7. Repeat to verify7. Repeat to verify
Parts of an ExperimentParts of an Experiment
Experimental Set-upExperimental Set-up: The part of : The part of the experiment that contains the the experiment that contains the variable tested.variable tested.
Control Set-upControl Set-up: The part of the : The part of the experiment that does NOT experiment that does NOT contain the variable (used as a contain the variable (used as a comparison) comparison)
Parts of an Experiment Parts of an Experiment cont…cont… Independent Variable:Independent Variable: The The
CAUSE.CAUSE. What What II change about the change about the experiment. Usually time when experiment. Usually time when graphed. Located on the graphed. Located on the XX axis. axis.
Dependent Variable:Dependent Variable: The EFFECT. The EFFECT. What you count, measure or What you count, measure or observe. Located on the observe. Located on the yy axis. axis.
Parts of an experiment Parts of an experiment Cont…Cont… Constants:Constants: The parts of an The parts of an
experiment that are kept the experiment that are kept the same in both the contol set-up same in both the contol set-up and experimental set-up.and experimental set-up.
Types of InformationTypes of Information
QualitativeQualitative: Does : Does not use numbers. not use numbers. Usually based on Usually based on observation.observation.
QuantitativeQuantitative: : Uses numbers. Uses numbers. What is counted What is counted or measured.or measured.
International System International System of Measurements. (SI of Measurements. (SI units)units)
SI Base Units
Measurement Unit Symbol
Length meter m
Mass kilogram kg
Time second s
Temperature Celsius c
Volume (liquid) Liter l
Cubic centimeter
Volume (solid) cc
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