Post on 14-Jan-2016
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
AGENDA
1. Bell Work
2. Vocabulary Organizer
3. Introduction to New Experimental Vocabulary
4. Blood Demonstration
5. Practice
6. Exit Ticket
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
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
Check for Understanding
Explain to your elbow partner why letter D is the correct
answer.
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
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.
1.
2.
3.
4.
Scatter Plot
Pie Chart
Bar Graph
Line Graph
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.
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
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
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.
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!