© Fall 2005, Pflugerville ISD, 8th Grade 8th Grade Science.

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Presentation transcript:

© Fall 2005, Pflugerville ISD, 8th Grade 8th Grade Science

© Fall 2005, Pflugerville ISD, 8th Grade 8th Grade Science PISD PowerPoint Lessons Developed By Ryan Gross, Park Crest Middle School Edited By Kenn Heydrick, Coordinator of Science & Health

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 Chapter 1- Science in our World Section 1: Science and Scientists Section 2: Scientific Methods Section 3: Scientific Models Section 4: Tools, Measurement and Safety

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is Science? What have you done today that involved the use of science? What Do You Think?

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is Science? Science Starts With a Question…

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is Science? Why is the Grass Green?

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is Science? Why is the Sky Blue?

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is Science? What Makes an Airplane Work?

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is Science? Through careful investigation involving: Research Observation Experimentation All of these questions and more can be answered!

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is a Scientist? What has a scientist done for you today? What Do You Think?

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is a Scientist? Scientists Make Observations…

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is a Scientist? Scientists Form and Test Hypotheses…

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is a Scientist? Scientists Analyze the Results…

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is a Scientist? Scientists Draw Conclusions…

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is a Scientist? Scientists Communicate Results…

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is a Model? What would it look like if I were holding a life-size model of the earth? Draw a picture… What Do You Think?

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is a Model? Physical Models

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is a Model? Mathematical Models

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is a Model? Conceptual Models

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is SI? The weatherman said it’s going to be 45 degrees. Is this hot or cool? Does it matter where on Earth you are? What Do You Think?

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is SI? 45 Degrees Fahrenheit:

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is SI? 45 Degrees Celsius:

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is SI? In the late 1700s, The French Academy of Sciences set up a system of weights and measures based on the number ten

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is SI? This “metric system” was accepted by scientists and governments around the world as the International System of Units, or SI.

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is SI? SI Units for Length:

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is SI? A meter is the SI unit of Length. Other SI units of length are larger or smaller than the meter by factors of 10 A centimeter is 1/100 th of a meter A kilometer is 1000 meters

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is SI? SI Units for Volume:

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 How Can Matter Be Measured and Compared? Volume can be measured using a graduated cylinder. It is marked in milliliters (mL). A milliliter is equal to one cubic centimeter (1cc)

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is SI? SI Units for Mass:

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What Are Three States of Matter? Mass is the amount of matter something contains. A large, heavy object has more mass than a small, light object. Which has more mass?

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 How Can Matter Be Measured and Compared? Mass is measured in units called grams and kilograms. When the pans are level, the objects on the two pans have the same mass.

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 How Can Matter Be Measured and Compared? 1.Select 5 objects to measure on a balance. 2.Measure and order the objects from the least to the greatest mass. 3.Share your findings with the class. 4.Can you find objects that have the same mass? Try This!

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is SI? If you measure the mass and volume of an object, you can calculate its density Density is the amount of matter in a given volume

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is SI? SI Units for Temperature:

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is SI? Temperature is a measure of how hot or cold a substance is Temperature is often measured using the Celsius scale, but the Kelvin scale is also used by scientists

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 What is SI? Three Temperature Scales:

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 Let’s Review! What is Science?

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 Let’s Review! If your hypothesis is not supported by your experiment, do you give up? Why or why not?

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 Let’s Review! How are models used to represent the natural world? What are two limitations of models?

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 Let’s Review! What is the density of lead if a cube measuring 2 cm per side has a mass of 90.8 g?

© Fall 2005, Pflugerville ISD, 8th GradeUnit A : Chapter 1 r/everyday.htmhttp://lamar.colostate.edu/~hillge r/everyday.htm /kids/Research_Rack/tools/scient ific_method.htmlhttp://whyfiles.larc.nasa.gov/text /kids/Research_Rack/tools/scient ific_method.html