brainstorm everything you know about the scientific method...
Post on 09-Mar-2018
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Do Now!
Brainstorm everything you know about The Scientific Method
What is it?
What is it used for? List examples of when you might use it.
The Object! l Your group will be given an object l Your goal is to:
– Ask questions – Gather information – Develop a statement about what the
object is – Have data about the object – Conclude what the object must be – Tell the class about your object
What Is Science?
l A logical explanation of the ___________________ – ONLY the natural world – Myth, fantasy, supernatural, or dogma
cannot be interpreted with science – Must be based on _____________ and
________________ evidence
Scientific Evidence
l Data based on observations –
l How Many? l How much?
– l Color l Texture
l Must be objective and without _____ – Not always the case
How is Science Conducted?
l The Scientific Method – – Involves:
l Observation l Asking Questions l Hypothesizing & Experimenting l Collaborating
l Enables scientists to repeat the work of others
Starts with ______________
l Ex: l 1976 doctors in Zaire observed
identical symptoms in several disease patients – Severe headaches – Fever – Bloody diarrhea – Vomiting – Eventual death from internal bleeding
Any QUESTIONS???
l All scientific investigations begin with questions – Result from observations – The reason for conducting an
investigation l Ex: l How is the disease transmitted? l Do all victims die? l What is the disease causing agent?
Collecting _______
l Any information gathered when trying to answer questions – Usually the longest phase
l Different methods: – Observation – Measuring – Sampling – Organizing Data
l IMPORTANT
Forming a ______________
l • Must be TESTABLE • DOES NOT HAVE TO BE CORRECT! • It is a guide for your research l Takes the form of an IF… THEN…
statement – Ex: IF the threadlike virus is the disease
agent, THEN introducing it to healthy tissue would cause cell death.
Conducting an EXPERIMENT
l This is how you test your hypothesis l ________________________
– Compares a Control Group with an Experimental Group
– Identical except for ONE factor l Called the INDEPENDENT/MANIPULATED
variable l DEPENDENT/RESPONDING variable is
observed
Virus Experiment
l Control group – Monkey kidney
cells placed in test tubes à
l Experimental group – Monkey kidney
cells placed in test tubes à
– No infected blood added à
– Infected patient blood added à
– Cells _______ – Cells _______
Data ___________
l Process of determining whether data: – Is reliable – Supports or refutes a hypothesis or
prediction l Can use statistics to determine
relationships between variables l Compare data with other studies l Determine sources of experimental
error
What can you ___________?
l Goal is to produce a model – An explanation supported by data – Can be visual, verbal, or mathematical – Can often lead to new hypotheses or
predictions l Ex: Direct contact with the blood of a
person infected with Ebola Virus seems to be the likeliest way to become infected.
Inferences
• Conclusions made on the basis of prior knowledge / experienceses instead of direct observation
• Can be used to develop new hypotheses • Ex: Scientists inferred that Ebola is carried
by a small, forest-dwelling animal (i.e. bat) • What is this?
Forming a ___________
l Only possible after MANY related hypotheses have been tested and supported by much experimental evidence. – Few true theories are produced in
science – Can you think of any?
How Scientists View the World
§ Using the scientific method § Revising and changing hypothesis and
theories – Science is forever changing based on new
data – Science will never have an answer for the
ultimate truth – Science cannot determine beauty or
morality
Science Cannot solve the world’s
problems: It can provide information and
make recommendations. Humanity can then use this data
to make choices.
Lets See the Scientific Method in Action
§ What happens when you mix Diet Coke and Mentos???
Exit Activity - Summary
§ Work with a partner to summarize the concepts we learned about today:
HOMEWORK!!!!!! • Review Scientific Method in
textbook. • Complete Scientific Method
Study Guide
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