AGENDA: flash cards and HW are due Friday Warm Up: 1. Brainstorm a list of about 5 moving objects. Share your ideas about what makes those objects move. 2. What is your favorite motion picture (movie) and why?

Persistence of Vision In a movie, we discussed how pictures change their position over time and create the illusion of movement or motion. This is because of something called the persistence of vision. The persistence of vision is the ability of the eye to retain an impression of an image a short time after it has disappeared. Us enjoying movies, video games, the ability to read all depend on this idea.

UNIT: 7.P.1 Understand motion, the effects of forces on motion and the graphical representations of motion.

7.P.1.1 Explain how the motion of an object can be described by its position, direction of motion, and speed with respect to some other object. Essential Questions 1. How can the motion of an object best be described? 2. Why do reference points depend on who is observing the motion?

I CAN….  I can describe the motion of various objects with respect to a reference point.  I can explain why moving objects cannot serve as a reference point.

VOCABULARY WORDS 1.Dependent Variables 2.Independent Variables 3.Qualitative 4.Quantitative 5. Reference Point 6. Motion 7. Speed 8. Position

PRACTICE IDENTIFY THE DIFFERENCES BETWEEN QUALITATIVE AND QUANTITATIVE DATA. Dimensions: 29 in × 36 1 ⁄ 4 in Painted:1889 Worth over 100 million dollars

MYSTERY OF MOTION We didn’t always know how it worked.

A BET & A HYPOTHESIS: Leland Stanford, the 8 th governmor of California hired a dude named Edweard Muybridge, a famous photographer to settle a $25,000 bet. The question was whether all of a horses hooves leave the ground when in full gallop. Most people believed that a horse always had one foot on the ground while galloping. Stanford’s hypothesis was that a horse did not always have all four feet on the ground when it was running. If you could bet $25,000, what do you think?

THE EXPERIMENT: In order to prove the point, Muybridge had to invent a special camera system with a very fast shutter. He set up 12 cameras on a race track. Muybridge used 12 cameras arranged parallel to the track and spaced 27 inches apart. Muybridge was able to capture the horses full gallop and settle the bet. He attached a string to the shutter of each camera and ran the strings across the track. As the horse came down the track it snapped each string, setting off the shutters one by one.

DID THE GOVERNOR'S HYPOTHESIS PROVE TRUE?

WHAT IS YOUR DEFINITION OF MOTION?

TURN AND TALK 30 SECONDS Discuss with your partner what motion is. What does changing position over time mean?

We know what MOTION is, but what is POSITION? Raise your hand and list synonyms for position.

How do you describe the location of an object? 1. Choose an object in the classroom that is easy to see. 2. Without pointing to, describing, or naming the object, give directions to a classmate for finding it. 3. Ask your classmate to identify the object using your directions. If you classmate doesn’t correctly identify the object, trying giving directions in a different way. Do this until your classmate has located the object.

What do you think? 1. What kinds of information must you give another person when you are trying to describe a location? 2. Come up with your own definition for location.

SO WHAT IS POSITION??? The position of a place or an object is the location of that place or object. Often you describe where something is by comparing its position with were you currently are. Example: You might say that a classmate sitting next to you is about a foot to your right. Each time you identify the position of an object, you are comparing the location of the objecting with the location of another object or place.

What is happening in this picture?

EXIT TICKET Give an example of motion and a non-example of motion. Briefly explain your non-example. Be sure to use the words motion and position in your explanation.