Q3 Review(1)

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Quarter 3 Review

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Flowing Electricity: Michael Faraday

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• _{Where a magnetic field exist, there will exist the potential to cause}

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• _{In a magnet, opposite poles _________________, while like poles}

_____________________________.

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• _{“Where there is a flow of electrons (electricity), there will form a}

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Flowing Electricity: Michael Faraday

• _{Michael Faraday found that magnetism, electricity, and}

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• _{In a generator, the job of the magnet is to}

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Flowing Electricity: Batteries

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• _{In a battery, this part encourages electrons to flow from one metal to}

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Flowing Electricity: Batteries

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Static Electricity

• _{What would happen if the balloon was moved towards the wall?}

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Static Electricity

• _{An object with mostly electrons covering it is said to be}

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Static Electricity

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History of Electricity Reading

Homework

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Homework

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Homework

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Homework

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Homework

• _{What was Edison’s “major challenge” in trying to invent a easy to use}

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Homework

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Homework

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Homework

The average American home uses 901 KWh per month. What would be your parent’s electricity bill if they lived in 1882? What would it be

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History of Electricity

• _{These scientist built a 40 ft. lightning rod to capture the electrical}

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History of Electricity

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• _{This scientist was the first to build a super battery and release its}

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• _{What was Stephen Gray’s contribution to our understanding of}

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• _{What was Benjamin Franklin’s contribution to our understanding of}

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Static electricity

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Static electricity

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Static Electricity

Is this item a conductor or insulator?

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Static electricity

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Static Electricity

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Static Electricity

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Static Electricity

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Electricity Terms

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Static Electricity

• _{An object with mostly protons sitting on it is said to be}

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History of Electricity

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Static Electricity

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• _{Which scientist discovered that all materials are either insulators or}

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Static Electricity

Is this item a conductor or insulator?

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Static Electricity

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Mechanical Advantage

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History of Science: Levers

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History of Science: Levers

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Experimental Design

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Pulleys

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Energy Conservation

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Pulley

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Simple machines: Incline Planes

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Lever

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Pulley

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Pulleys

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Simple Machines: Relationships

• _{What is the relationship between effort force and effort distance?}

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Energy Conservation

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Conservation of Energy

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Energy Conservation

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• _{How much force would you have to exert to lift a 10 lbs box if the box}

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Simple Machines: Incline Plane

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Work

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Simple Machines: Incline Plane

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Work

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• _{The distance across which work is done “with” the simple machine is}

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Simple Machines: Incline Plane

• _{What is the relationship between effort force and effort distance?}

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Use the Law of Levers

• _{How long would your effort distance have to be if you weight 80 lbs.}

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Recognizing Bias

• _{Dr. Tyler Graham is making observations at Peyton High School to}

investigate the rate of smoking among American teenagers. Dr.

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Recognizing Bias

Dr. Bott is conducting interviews of Peyton and Galusha High School

students to determine the rate of smoking among American teenagers. Dr. Bott gets a list of all the students from each high school and

randomly selects 50 students from each school. An appointment for the interview is scheduled with each student and their parents. Each

student is interviewed with their parents in the room. The students are asked questions such as, “Do you smoke regularly?”, “Have you ever

smoked?”, and “What percentage of your friends smoke?” After

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Experimental Design

• _{Lily wants to test which Kool-Aid flavor is the most popular among her peers (cherry,}

kiwi, or grape). She hypothesizes that grape will be the most popular because it is the flavor she sees her peers drinking at lunch. So she mixes a batch of each Kool-Aid flavor, being careful to place the same amount of sugar and water in each. She then surveys 100 kids by random. Each person taste the same amount of each Kool-Aid and choses the one they liked most. Lily recorded each vote using a tally system.

Lily concluded that her hypothesis was supported because the grape Kool-Aid received more votes.

Does Lily’s experiment contain bias? Why or Why not? If so, how would you fix her experiment?

Kool-Aid # of kids

Cherry 33

Kiwi 33

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Dr. Kemp is using both observations and interviews to investigate the rate of smoking among American teenagers. She first selected three study sites: one urban, one rural, and one suburban. Dr. Kemp went to two popular teenage hangouts in each study site and made

observations of the teenage students standing around the buildings. She observed a total of 117 students and of those 33 were smoking (28%). Dr. Garcia then went to one high school in each study site and interviewed 25 students from each school. The principal of each school selected the 25 students that would be interviewed for Dr. Garcia’s

study. Of the 75 total students only 3 said that they smoked regularly (4%). Taking the average percentage from her observations and

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