DAY 158

Video lecture for today: https://youtu.be/Q_jx-kdmO60

GOALS: swbat...

1. observe that light can only be seen when it bounces off an object

2. classify objects into the categories transparent and opaque according to how they interact with light 

WARM-UP (4 minutes)

        Answer in complete sentences

• 1. Think: can you see a light beam as it travels?

  2. What light can you see in this room now?

  3. Can you actually see the light traveling from the light bulbs to the objects in the room?

CLASSWORK

1. 158A & 158B: Reflection of EM Waves

- Please read the instructions 

- read handout, answer questions, and solve problems. 

- Today's assignment is on a slideshow, and will be completed on Schoology

    Lesson 

    a. take notes on the new terms

    b. draw pictures showing incident ray, reflected ray, normal line. 

    c. draw the house, person, sun, dog from slide 11. Draw an incident ray from the sun, and show how light travels to allow the person to see the house.

    d. explain in detail why Timmy's explanation is incorrect.

Slideshow LINK

ESSENTIAL QUESTION: How can we build a motor out of magnets, wire, and a battery?

Goals: SWBAT...

1. Conceptually ascertain & numerically calculate the properties of an Electric Field by testing the effects of charge & distance on the strength of an electric field & force.

2. Align positive & negative charges such that a positive test charge will enter the goal.

3. Interpret electric field line drawings

4. (HW) Define resistance and Ohm's Law

WARM-UP (copy these notes, then fill in) 4min

        Need help? See the link just below the warm-up? Click it and go to Slide #2...

• • Electric Force: non-_______ force, just like gravity.

  • Electric Field: all _______ objects create an electric field that extends outward into the space it surrounds

    • A charged object can attract or ______ at a distance

    • Stinky diaper analogy: One stinky diaper will fill up a ______ room with the smell. If you stick your nose close to a stinky diaper, the smell will be quite ______. The farther from the diaper you get in the room the _______ smelly the scent gets. However, there will always be at least some _______ of stinky diaper everywhere in the room.

  • Electric Field Intensity: the closer to a charge OR the higher the charge at the source, the ________ the electric field.

  • Test Charge: the charge used to measure the electric field _________.

  • LINK: https://docs.google.com/presentation/d/1YnCkOUaODNns5_W0KxGlorZrt2XjpvoZeukAwWolAr0/edit?usp=sharing

CLASSWORK

1. 157C: Electric Field Hockey Lab (continued) (20 min)

    Complete the remaining levels, in your notebook: LINK

    Due Thursday in class

2. 158A: Electric Field Notes (4min)

    slides 2,7,8

    LINK

3. 158B: Electric Field Practice (15min)

    Document is on Schoology. You should be able to complete it in class.

    Can't access schoology? Here's a backup link (LINK)

4. Wrap Up:

    - Which way would E Field arrows point around a negative charged particle?

    - How can you get a charged particle to change direction?

    - When E Field lines are drawn close together, what does that tell you about their strength?

LEARNING AT HOME (HW)

158C: Resistance & Ohm's Law Guided Reading

    Textbook Reading: LINK

    Blank document for your answers is on Schoology. Can't access schoology, here's a backup link (LINK)