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BELL WORK 9/3/2014 You are outdoors. The sun shines brightly. A cold wind blows from the north. You...
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Transcript of BELL WORK 9/3/2014 You are outdoors. The sun shines brightly. A cold wind blows from the north. You...
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BELL WORK 9/3/2014•You are outdoors. The sun shines brightly. A cold wind blows from the north. You shiver. Then you zip up your coat. Which pair of words represents a cause-and-effect relationship? •A scarf, shiver •B wind, shiver •C shiver, wind •D sun, shiver
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AGENDA
1. Bell Work
2. Vocabulary Organizer
3. Introduction to New Experimental Vocabulary
4. Blood Demonstration
5. Practice
6. Exit Ticket
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VOCABULARY ORGANIZER• A controlled experiment is an experiment that
_______ only ____ _______at a time by using a comparison of a control group with an experimental group.• A _______ _______ is the group in the experiment
that does not change; stays the same throughout the experiment; variable is not applied to this group; we compare all other groups to this one.• A _______ _______ is a factor (or something that
contributes to a result) that does not change; stays the same throughout the experiment; constant.
tests one factor
control group
control factor
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CONTROLLED EXPERIMENT
• An ___________ _______ is a group whose conditions are __________ or ___________.• A factor that _________ in an experiment in order to test the
hypothesis is called a ___________.• The ___________ __________ are the factors that you choose to
change in the experiment.• The ___________ __________ are what change naturally in the
experiment because of the independent variable.
experimental groupchanged manipulated
changesvariable
independent variables
dependent variables
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Check for Understanding
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Explain to your elbow partner why letter D is the correct
answer.
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NEW VOCABULARY: SCIENTIFIC MODELS
• A _______ is a representation of an object or system.
• They explain how something works or describe the structure of something.
• Examples of models:• Physical model- model volcano• Mathematical model- graph or chart• Conceptual model- system of ideas or theories.
model
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NEW VOCABULARY: TYPES OF GRAPHS• Bar graph: used to present and compare data.
• Line graph: show relationships between the data and display a change over time.• Pie chart: used to represent categories of data
or values of variables (out of 100%...). • Scatter Plot: used to investigate the possible
relationship between two variables that both relate to the same "event." For example, a scatter plot could let you see if there's a relationship between population and crime levels.
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1.
2.
3.
4.
Scatter Plot
Pie Chart
Bar Graph
Line Graph
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BENEFITS & LIMITATIONS OF MODELS
• Benefits: mobile, can be as large or as small as needed, helps us to better understand history, testable
• Limitations: models do not act or work exactly like the things they represent
Share with your elbow partner some benefits of models and some limitations of models.
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NEW VOCABULARY: CONTROLLED EXPERIMENT
RESULTS• Cause and Effect
• The ________ is the reason for the result.• The ________ is the result.• For example: Because the plant had no sunlight (cause), it died (effect).
• Conclusions• A ____________ is when you compare your hypothesis with the results of the
experiment.
cause
effect
conclusion
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NEW VOCABULARY: THEORY VS. LAW
• An explanation that ties together many hypotheses and observations is called a theory; NOT 100% proven true.• Example: The Big Bang Theory
• A law is a statement of what will happen or an explanation of how things work.• Example: The Law of Gravity
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BLOOD DEMONSTRATION
You will observe and collect data during the demonstration.
You will then practice recording your data using the sheet provided.
Remember to reference your academic vocabulary for help.
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EXIT TICKET
List two new things that you learned today in class about designing an experiment.
You must turn in your Exit Ticket before you leave class!