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Variables 8 th Grade Science
Does the mass of a derby car affect its speed? Scientific Question (problem):
What is being tested or compared in an experiment. It is what the experiment is all about It is the cause. It is the before
What is being tested or compared? Does the mass of a derby car affect its speed?
The outcome or the results of the experiment What is being measured. It is the effect. It is the after.
What is being measured? Does the mass of a derby car affect its speed?
How to Write a Hypothesis Describe the relationship between the IV & DV: –The more/less of the _IV_, the more/less the ___DV__.
The Hypothesis should predict… As the IV (increases or decreased), the DV (increases or decreases).
Hypothesis The more mass the car has, the faster it will go. or The less mass the car has, the faster it will go.
Constant Variables Stay the same throughout the experiment
Constants Race course (distance, steepness, etc) Wheel size Shape Same kind of wood/brand Drop time (release levers)
Control (normal) – plain wooden car Experimental Group- Different weights added to car
2 nd Daily Question: Write hypothesis & complete design chart Does the shape of the pinewood derby car, affect its speed? Hint: use word aerodynamics
Attributes of an Experiment. What makes an experiment scientific? 1.Variable Components of an experiment that can be changed 2.Independent Variable (IV)
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Variables Practice As you proceed through these slides…write down what you think the answers are to the questions before you click the next slide to see.
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Why Do We Do Experiments? To Learn Why Do We Do Experiments?
Scientific Method A series of steps designed to solve a problem or learn more about the world around you.
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Scientific Method. Independent Variable (IV) what you change in the experiment this “change” needs to be measurable examples weight mass volume.
Experimental Design pendulum My Grandfather clock is running fast. How do I adjust the timing?
8 th Grade Science September 14, 2010 Ms. McKinley.
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Designing an Experiment. Think of a Question What do you want to know? (1) “What is the effect of the____on the _____?” Change the question into.
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IDENTIFYING VARIABLES. Variable Able to Change Variable: A factor that can change in an experiment. Every experiment has two – one is the cause, the other.
Variables How do you identify them?. Independent Variable What changes in an experiment I can change it = Independent Variable Example: You are testing.
THE SCIENTIFIC METHOD Just Do It! 1. If you have a chunk of gold with a density of 4.0 g/ml and you break it in half, what is the density of each half?
Bell Ringer 29 June LT: Describe how acceleration over a period of time affects the velocity of an object. Discuss with your team which forces applied.
Unit 1 – Lecture 2. Harold owns two hamsters – they live in separate cages, but they’re exactly the same in every other way [age, weight, cage design,
Pendulum Lab Physics First Graphing Practice. Graphing in Physics Physics looks for RELATIONSHIPS between variables – Relationship between your independent.
Unit 1: The Nature of Science. What is science? Science is a way or a process used to investigate what is happening around you. It can provide possible.
The Man’s PSSA Practice What change could be made in the setup in diagram 1 to increase the amount of force necessary to move the block of wood? Add.
Scientific Method Mr. Chon / Science. Introduction Includes purpose Includes purpose What will you learn from this experiment? What will you learn from.
Science Fair 2010 February 17 Registration forms due: January 28.
Scientific Method. Steps in the Scientific Method 1. Make Observation. 2. Ask Question. 3. Make a hypothesis. 4. Test your hypothesis. 5. Analyze the.
All scientific experiments begin with simple questions…. It is this sense of inquiry that ESP begins its journey…. …with a QUESTION.
Science is NOT about how many answers you know, but how you BEHAVE when you don’t know.
Designing a Lab Standard 1: Design and conduct scientific investigations using appropriate vocabulary, tools, and techniques.
Do Now List the steps of the SCIENTIFIC METHOD.
Graphing Techniques and Interpreting Graphs. Introduction A graph of your data allows you to see the following: Patterns Trends Shows Relationships between.
Scientific Method Vocabulary Terms. HYPOTHESIS The part of an experiment where you make an educated guess or prediction as to what will happen. Your hypothesis.
Experimental Design How to conduct a valid experiment.
1. What is mass? 2. What is weight? 3. What is the scientific method? › After you define, list all the parts you remember below your answer.
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Day Topic: Lab Write Up Objective: I will graph data from table and compare XT graphs of uniform and accelerated motion. Starter: Acceleration.
SCIENCE An organized way of studying things and finding answers to questions.
8/15/12 We want to see if running with weights on improves speed. Using 5, 10, 15 lb vests – be able to tell the 4 parts of the experiment that is needed.
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