Today’s Reading

Today’s Reading

Step 1: Skim through the entire passage. Look for main ideas. Step 2: Read the passage as a class. Highlight main ideas. Step 3: Complete the questions on your own. Step 4: Review answers as a class.

Let’s Recap KE and PE…

http://www.youtube.com/watch?v=vl4g7T5gw1M&feature=related

Skate Park Simulation

http://phet.colorado.edu/en/simulation/energy-skate-park

Entrance Question

Explain the energy involved in the two images. Be sure to include kinetic energy and potential energy in your answer.

Gravitational Potential Energy

What is the difference between potential energy (PE) and gravitational potential energy (GPE)?

Gravitational Potential Energy

Definition: the energy an object possesses because of its position in a gravitational force field

Gravitational Potential Energy

What two factors affect an object’s GPE?

Gravitational Potential Energy

How could we test this to be sure? Materials: Hollow plastic egg, pennies, open container of sand, meter sticks

Variable: Height

Mass of Egg (g)

Drop Height (cm)

Diameter of Crater (cm)

Variable: Mass

Mass of Egg (g)

Drop Height (cm)

Diameter of Crater (cm)

In your notes…

Gravitational Potential Energy Definition: the energy an object possesses because of its position in a gravitational force field Factors Affecting GPE: Height: the greater the height, the more GPE the object will have Mass: the greater the mass, the more GPE the object will have

Entrance Question

Why do engineers design the beginning of most roller coasters the same way? Use the terms below in your response. kinetic energy & potential energy http://www.youtube.com/watch?v=yOTgWr0J1Bw

Marble Track Lab

Materials: Pencil Two coloring utensils (colored pencils or highlighters) Marble Track Lab handout Expectations: Collaborate respectfully - Stay on task Be creative - Use the materials appropriately Follow directions carefully - Wait patiently at checkpoints

Marble Track Lab

Greens: Back of the room Yellows: Front of the room

Marble Track Lab

Materials: Pencil Two coloring utensils (colored pencils or highlighters) Marble Track Lab handout Expectations: Collaborate respectfully - Stay on task Be creative - Use the materials appropriately Follow directions carefully - Wait patiently at checkpoints