Welcome to Biology- BL. 2
Sit down quietly, get your Syllabus out and turn
it into the brown box on the desk by the door.
Wait for instructions.
Biology
CH. 1- The Science of Life and the God of
Life
1B- Scientific Method
• What is Science?
- The collection of observations,
inferences, and models produced
through a systematic study of
nature…
OR
- Systematic methods that produce
the observations, inferences, and
models.
• Scientific Method
- A logical procedure for choosing
an answer:
1) Define the problem
2) Do preliminary research
3) Form a hypothesis (a simple,
testable statement that predicts
the results expected from a
research study.
Example of the Scientific Method
• You are told you can have a new
cell phone. Your parent is willing
to pay for any phone you want.
You just have to choose which
one you want….
• Which phone would you
choose?
• What you would probably do:
1) Realize you have options.
2) Research all the latest phones,
check out their reviews online,
compare phones that have
abilities to do things you want
done, try your friend’s phones
out, go to the store and check
them out, etc.
3) Make up your mind on which
one you want the most… Get the
phone.
Steps of the Scientific Method
• Observe the experiment
• Collect the information from the
experiment and record it (datarecorded information).
• Classify the data into a logical
order or groups
• Analyze the data to determine
what they reveal about the
problem
• Choose the solution that best
answers the question
• Verify the chosen answer by
repeating the experiment
- Validity
- Reliability
• Predict what will happen in a
similar situation.
Controlled Experiments
• Controlled Experiment- Has two
groups:
1) control group
2) experimental group
• Independent Variable- Difference
between two groups
• Control Group- group not
exposed to independent variable
• Experimental group- group
exposed to independent
variable.
• Dependent Variable- the results
that are dependent on the
Independent Variable
Limitations of Science
• Phenomenon
- Questions dealing with how or
why are not measureable,
therefore, these questions are
beyond the scope of science
- Mankind attempts to use science
to explain God, his coming of
being, how we got here, why
people die, etc. Science cannot
answer these questions.
• Bias
- Something someone wants to
believe whether they are
conscious of their bias or not.
• Absolute Answer- Science
cannot PROVE anything. It can
only suggest based off of
previous repetitions and
prediction.
• Just because an answer is valid
does not mean it is correct.
Homework
Read and Outline CH. 1B and Ch. 1C of Biology text book
Work in groups of 2- Create a fictitious experiment. Define:
1. Problem
2. Hypothesis
3. Controlled Group
4. Experimental Group
5. Independent Variable
6. Dependent Variable
7. Possible Limitations
Biology - Chapter 1
• Quietly get your “Experiment paper” out from last class’s experiment.
Turn them into the brown box on my desk.
• Start your quiz. You have 10 minutes. Good Luck!
Biology
Chapter 1C- Biology and the Study of Life
Ch. 1C Biology and the Study of Life
Biology
• Definition:
• Bio- life or Living (Greek term)
• Ology- the study of
Attributes of Life:
1) Exhibits movements
- Including internal movement such as
blood in the blood vessels of a fetus
2) Achieves growth
• Together= The study of life
- Growth is achieved by an
organism, it is not done to the
organism.
- Assimilation- assembling of the
component parts that make up their
living material.
Attributes of life Cont.
3) Reproduces- Making of another
organism that has characteristics
and limitations similar to the
original.
4) Comes from similar preexisting
life
- Variations: ex. Dogs
- Of the same kind
5) Has similar chemical makeup
6) Is composed of cells
7) Exhibits irritability
- the ability to respond to a
stimuli.
8) Requires energy
- Ex: food
Microscopes
Compound Light Microscope
Electron Microscope
• Two sets of lenses located in the
objective and the ocular (eyepiece).
• Many CLM’s consist of several
objectives on a revolving
nosepiece for different
magnifications.
• Stage- placement for specimen
• Body tube- long tube between
eyepiece and objective.
***Replaces small light rays with
electrons that travel in a straight
line. Electron microscopes have
much greater magnification due to
this replacement.
• 2 types- Transmission and
scanning
Microscopes
Compound Light Microscope
Electron Microscope
Homework/ Coursework
• In class:
• Break into groups of 2 and work quietly on the Microscope worksheets
• Study together for CH. 1 Test- know material thoroughly
• Homework:
• Study for CH. 1 Test