Transcript Disease Detective Solves

BB#5 - Identifying Variables
Controlled variables:
Manipulated variable:
Responding variable:
BRAIN BOOSTER #1
A. Make three observations about the image above.
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BRAIN BOOSTER #1
B. What questions come into your mind as you
observe the image?
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Salmonella Bacteria
• Salmonella is a type of
bacteria commonly found
in poultry and eggs.
• One kind of salmonella
causes gastroenteritis
(food poisoning).
• Symptoms include
abdominal pain, fever,
nausea, vomiting, and
diarrhea.
Avoiding Salmonella
• Be sure to cook foods, such as
chicken and eggs, thoroughly before
eating them.
• Clean cooking surfaces after
preparing raw chicken.
• Store food properly in refrigerator.
• Pay attention to cleanliness!!
Disease Detective Solves
Mystery
An Introduction to
Scientific Inquiry
The Colorado Health Department
had a problem.
• Seven children had become sick with
diarrhea, stomach cramps, fever, and
vomiting.
• Within days, another 43 people had the
same symptoms.
• Tests indicated that they all had become
infected with salmonella.
WHO IS THE ARTICLE
ABOUT?
Dr. Cindy Friedman, a microbiologist
who specializes in studying infectious
diseases.
WHAT HAPPENED?
People became infected with salmonella
bacteria.
WHEN DID IT HAPPEN?
Dr. Friedman discovered the cause in 2001.
WHERE DID IT TAKE PLACE?
The problem occurred at a Colorado zoo.
WHY DID IT HAPPEN?
Dr. Friedman discovered that all the children
had visited a reptile exhibit at the local zoo.
After testing the animals, she found that a
lizard was contaminated with the bacteria.
HOW WAS THE PROBLEM
SOLVED?
Dr. Friedman used the skills of scientific
inquiry to solve the mystery in Colorado.
Questioned
Experimented
Analyzed
Compared
Hypothesized
Organized
Observed
Communicated
Brain Booster #2
Thinking Like a Scientist: Observing,
Inferring, and Predicting (p.786)
Brain Booster #2
Observations:
Inference:
Prediction:
What is Science? Vocabulary
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Science
Scientific inquiry
Observation
Data
Inference
Hypothesis
Variables
Manipulated variable
Responding variable
Controlled experiment
International System of Units
Scientific theory
BB #3 - Vocabulary Review
____1. Inference about a
future event
____2. Facts gathered
through observation
____3. Interpretation of an
observation
____4. Using senses to
gather info
a. observation
b. data
c. prediction
d. inference
Notes #1 - The Scientific Method
Posing Questions - The scientific method
starts when you ask a question about
something you observe: 5W’s - 1H?
Research - Find out as much as you can
about your topic.
Construct a Hypothesis - This is a proposed
solution to the problem that is being
investigated.
Conduct an Experiment - The experiment
tests whether your hypothesis is true or
false.
Analyze Results - Collect and analyze
information obtained during the experiment.
Conclusion - An explanation of what was
observed during the experiment that lead
you to believe your hypothesis was right or
wrong.
BB #4 - Applying the Scientific
Method
1. Identify the problem (the question
being investigated).
2. What was Fleming’s hypothesis?
3. How was the hypothesis tested?
4. Should the hypothesis be supported
or rejected based on the experiment?
Notes #2 - Designing an
Experiment
- In science, controlled experiments are
conducted to test hypotheses.
- A controlled experiment contains two
groups: the control group and the
experimental group.
- The experimental group contains the
manipulated variable.
- All other variables are identical among the
two groups.
Notes #3 - Making Measurements
- Scientists use the International System of
Units (SI) to communicate results of
experiments.
- It is based on the metric system.
- Basic units of measurement (SI):
Length Volume Mass Temperature -
meter (m)
liter (L)
gram (g)
degrees Celsius
BB#6 - Metric Conversions
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____mm = 1 cm
____ cm = 1 m
____ mm = 1m
1 km = ____ m
____ mm = 1km
6. 1L = ____ mL
7. 1kL = ____ L
8. ____ mg = 1 g
9. 1 kg = ____ g
10. ____ mg = 1 kg
BB #7 - Extra Credit
Measurement
Mass: ______ g
Volume: ______ mL
Conversion
Mass: _____ mg
Volume: _____cL
Temperature: ______C
Temperature _____F
Length: _____cm
Length: ______mm