SEPT 8 2016 Go to google classroom Open up today’s assignment-LAB NEWTON’S PENCIL LAB PreAP/gt: don’t forget to turn in Newton’s Law slide REMINDERS: OPEN HOUSE TODAY LAB TODAY -NO OPEN-TOE SHOES CCA= SEPT 20TH PROJECT COMING UP: NEWTON’S BALLOON CAR

Logical, problem-solving using step-by-step procedures. The Scientific Method

Sept 8 2016 LAB TODAY NO CHROMEBOOKS NEEDED

•A question without an answer that compares variables. Problem Statement •A question without an answer that compares variables. Should be what you want to find out. –Example: Does the MASS OF MY CAR EFFECT THE DISTANCE IT TRAVELS?

After identifying a problem, a EDUCATED GUESS is developed. What you think the results of the experiment will show. Example: If THE MASS OF THE CAR IS SMALL THEN THE CAR WILL TRAVEL FAR because MASS EFFECTS THE ABILITY TO MOVE…(explain why) Hypothesis

a series of carefully planned steps of the experiment that will be followed to answer the problem and test the hypothesis. Note: An experiment can only test one independent variable at a time. Note: To ensure reliability and validity, repeated trials should be done. Procedure

Scientist make using their senses. Observations What do you see? Did it change? Is there an odor? Did the texture change?

Observations lead to conclusions about observations results

Example:Does the MASS OF MY CAR EFFECT THE DISTANCE IT TRAVELS? What two things are changing? MASS, AND DISTANCE These are the VARIABLES. There are two kinds of variables:

There are 3 kinds of variables: independent variable What Are Variables? Anything that is changed in the experiment either by the scientist or as a result of a change by the scientist There are 3 kinds of variables: independent variable dependent variable Control

(Also called Manipulated Variable)- The cause- the variable that the scientist changes. “I” change this variable by myself independently. Example:Does the MASS OF MY CAR EFFECT THE DISTANCE IT TRAVELS? Independent Variable in example: MASS: THINGS USED TO BUILD CAR (we change them on purpose) Independent Variable

(Also called Responding Variable) _________________________Variable- the factor or outcome to be measured in the experiment. Variable we are trying to find out (data you are collecting) Example:Does the MASS OF MY CAR EFFECT THE DISTANCE IT TRAVELS? Dependent Variable in example: DISTANCE (We don’t know them before we start.) Dependent

________________________ the part of the experiment that is not changed from how it would happen naturally or the original directions in order to have something for comparison. Example experiment: Does the amount of MASS put on my OF MY CAR EFFECT THE DISTANCE IT TRAVELS? CONTROL

are collected during the experiment through numeric measurements and observations. Graphs Drawings Pictures Charts Tables And so on…. Data/Results

After analyzing data, a scientist makes a _______________which is valid only after multiple experiments supports Answers the problem Explains what the data shows (data should support conclusion) States if the hypothesis was supported or rejected Conclusion

visualize numerical data Let’s Review: Why Do We Use Graphs? Graphs help us . visualize numerical data There are several different types of graphs:

are used to show a comparison of multiple objects. BAR GRAPHS

are used to compare the parts of a whole. Pie Graphs

are used to the show the relationship between variables. Many times line graphs show change over time. Line Graphs

Draw this on your notes and label DRY MIX Y-axis Dependent Variable also called Responding Variable X-axis Manipulated Variable also called Independent Variable

Let's Practice

The Independent Variable is: Temperature Time Solubility 2. The Dependent a. Temperature b. Time c. Solubility

3. The variable that changes depending on some other factors Independent Variable Dependent Variable Controlled Variable

4. A variable that does not change for the duration of an experiment. A. Independent Variable B. Dependent Variable C. Controlled Variable

5. What you think the results of the experiment will show. Problem Hypothesis Conclusion Data

6. What is an opinion, or conclusion, based on observed facts. Observation Inference Data Conclusion