Wed., November 14, 2012

Physical Science A

Bellwork:
    1.  Explain why we see lightning before we hear thunder?

    2.  How is the reflection of light from a smooth surface difference from the reflection from a rough     surface?

Objectives:
1.  Draw ray diagrams to indicate how light reflects off objects or refracts into transparent media.

2.  Predict the path of reflected light from flat, curved, or rough surfaces (e.g., flat and curved mirrors, painted walls, paper).

3.  Identify the principle involved when you see a transparent object (e.g., straw, a piece of glass) in a clear liquid.

4.  Explain how various materials reflect, absorb, or transmit light in different ways.

5.  Explain why the image of the Sun appears reddish at sunrise and sunset.

Check and discuss the reflection activity.

Discuss refraction and colors.

Refraction activity.

HW:  Finish the question on the back of the refraction activity.

Physics A

Bellwork:
    1.  Explain how the work done in a situation relates to the amount of energy an object has (either kinetic or     potential).

    2.  What problem will a roller coaster designer have if he leaves the biggest hill for the grand finale?      Explain

    3.  Jonny pushes on a cart for 200 seconds and applies a force of 3500 Newtons.  If the object does not     move, how much work does Jonny do?  Power?

    4.  Josh places a box onto a shelf and the box falls off the shelf and strikes the ground traveling at 6.8 m/s.      How high was the shelf the box fell from?

Check and go over the kinetic energy and potential energy problems.  Grab a whiteboard.

Wrap up energy

KE and PE Lab.  When finished please answer the questions on the back.