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!