Email: wchan@philasd.org
Office Hours: Wednesday and Thursday 3:05pm-4:30pm, or by appointment

Thursday, March 31, 2011

Thursday March 31st

Objectives: (1) Explain how electricity and magnetism are related (2) Know what an electromagnet is

We took about 6 slides of notes today:


Turn in the class work the next time you're in class.

Homework:
Finish HW Packet 8! It is due tomorrow!

Electromagnets!

Use the simulation below to:

  • See what happens when the magnet moves through the coil at different speeds. How does this affects the brightness of the bulb?
  • Observe the difference between moving magnet through the big coil versus the smaller coil.

Wednesday, March 30, 2011

Wednesday March 30th

Today's objective: Explain how electricity and magnetism are related

We took 6 slides of notes today:


Turn in the class work assignment the next time you're in class.

Homework:
Wednesday's problems on HW Packet 8.

*If you printed HW Packet 8 from the website, I know some drawings might be missing so ask me to fill them in for you when you return to school.

Tuesday March 29th

Today's objectives: (1) Take Electricity Quiz (2) Learn about magnets

There was no Do Now today-- we took an open-note Electricity Quiz during the 1st 20 minutes of class. After, we played with magnets. Follow the power point below:



Homework:
Tuesday's problems on HW Packet 8. If you're printing it from the website, I know some drawings are missing. Come see me when you get back to school and I'll fill in the pictures for you.

Monday, March 28, 2011

Monday March 28th

Objective: Review Electricity (Ohm's Law, schematic diagrams, parallel and series circuit)

You have an open-note Electricity Quiz tomorrow! It will be during the FIRST 20 minutes of class (there will be NO Do Now tomorrow).

Follow the Power Point Presentation below:



Homework:
Monday's problems on HW Packet 8: Magnetism

Friday, March 25, 2011

Friday March 25th

Objective: Achieve 3000

Do Now:
1. What is the objective of today's class?
2. Let's say you have 2 sets of lights: 1 connected in parallel, 1 connected in series. Which set will have the same voltage throughout (brighter)?
3. In order to calculate the resistance of an object, what 2 things do we need to know?

Announcements:
- Open-note Electricity Quiz on Tuesday of next week during the first 15 minutes of class.
- HW Packet 7: Circuits is due today

Class Work:
Log onto www.empower3000.com
Read the article from Teacher Chan: "A New Use For Old Clothes"
Answer the activity questions
Answer the thought question

Homework:
None! Have a great weekend! Be good!

Thursday, March 24, 2011

Thursday March 24th

Objective: Create and draw electrical circuits

Do Now:
1. What is the objective of today's class?
2. In an open circuit, will the light bulb glow?
3. Draw a schematic diagram of a circuit consisting of: 2 batteries, wire and 2 light bulbs

Announcements:
You have an Electricity Quiz next week on Tuesday. Your quiz will be open-notes.

Class Work:
We continued to work on the Circuits Lab Handout.

Homework:
Finish up HW Packet 7. It is due tomorrow.

Wednesday, March 23, 2011

Wednesday March 23rd

Objective: Construct and draw electrical circuits

Do Now:
(1) What is the objective of today's class?
(2) Is plastic a conductor or insulator? What about metal?
(3) Let's say you leave a flashlight on for 2 hours. When you take out the battery, it's really hot. Why?

Announcements:
We will be doing a circuits lab that will last 2 days. Thus, your electricity quiz will be post-poned until NEXT WEEK, Tuesday. The quiz will still be open-notes.

Class Work:
Circuits Lab.
You will have to come back after school sometime this week to complete this lab. The supplies will leave Sayre HS on Friday.

Homework: 
Wednesday's problems on HW Packet 7.

Tuesday March 22nd

I was not in school today.

The class work (extra credit) was posted on the chalkboard.

Your homework: Tuesday's problems on HW Packet 7.

Monday March 21st

Objective: Explain how a circuit breaker works

Notes:


Class Work: Answer 4 of the 7 stations on a separate piece of paper. Turn it in the next time you're in class:
Station 1: What is the purpose of a circuit breaker?
Station 2: Draw a schematic diagram of a circuit made of: a light bulb, battery, wire and open switch.
Station 3: A nickel wire with a resistance of 25 Ohms is connected across the terminals of a 30V flashlight battery. How much current is in the wire?
Station 4: If the current in a certain resistor is 6.2 A and the voltage across the resistor is 110 V. What is its resistance?
Station 5: Describe the motion of charges through a flashlight, from 1 terminal of a battery to another.
Station 6: State 2 differences between a series and parallel circuit.

Homework:
Monday's problems on HW Packet 7

Saturday, March 19, 2011

Friday March 18th

Today's objective: Achieve 3000

Do Now:
1. What is the objective of today's class?
2. Calculate the resistance of a 50 ohm cell phone charger plugged into a 120 volt outlet.
3. What is a circuit?

Announcements:
- You have until MONDAY to turn in your signed syllabus for 30 points. If I have to mail yours home, you will NOT receive those points.
- HW Packet 6 was due today.

Class work:
Log onto: www.empower3000.com
Read the article sent from Teacher Chan: "How Far Can This Car Go?"
Answer the activity questions (75% or higher) and the thought question.

Homework:
None! Have a great weekend!

Thursday, March 17, 2011

Thursday March 17th

Objectives: (1) Define circuits (2) Identify 1 difference between a series and parallel circuit



Homework:
Thursday's problems on HW Packet 6

Wednesday, March 16, 2011

Wednesday March 16th

Objective: Solve Ohm's Law Problems

Do Now:
1. What is the objective of today's class?
2. State Ohm's Law.
3. Calculate the current running through a 30 Ohms copper wire connected to a 120V outlet.

Class Work:
Finished working on the Ohm's Law Handout.

Homework: 
(1) Get your interim signed, if you haven't done so already
(2) Wednesday's problems on HW Packet 6.

Tuesday March 16th

Today's objective: Solve Ohm's Law Problems

Do Now:
1. What is the objective of today's class?
2. What is voltage?
3. Name 2 electrical sources.

Class Work:
Continued working on the Ohm's Law Handout. Don't have one? Look at the post below or the Documents link to the right.

Homework:
Tuesday's problems in HW Packet 6: Ohm's Law.

Monday, March 14, 2011

Monday March 14th

Today's Objectives: (1) State Ohm's Law (2) Solve problems related to Ohm's Law

ANNOUNCEMENTS:
- 33 minute periods this entire week because of PSSA testing.
- Interim reports were distributed today in class. You have until Thursday to get it signed and returned or I will mail yours home.

4 slides of NOTES:


CLASS WORK:
We worked on this handout: How To Solve Ohm's Law Problems. It is worth 10 points and we will continue working on it tomorrow.

Friday, March 11, 2011

Friday March 11th

Our objective: Achieve 3000

DO NOW:
1. What is the objective of today's class?
2. What is resistance?
3. How are insulators different from conductors?

CLASS WORK:
Read the article sent from Teacher Chan titled: "These New TVs Will Grab You"

HOMEWORK: 
None (unless you didn't finish HW Packet 5!). Have a great weekend!

Thursday, March 10, 2011

Thursday March 10th

Objectives: (1) Explain difference between conductors and insulators (2) Define voltage, current, resistance

Follow the power point below:

HOMEWORK:
Finish HW Packet 5. It is due tomorrow.


Wednesday, March 9, 2011

Wednesday March 9th

Our objectives: (1) Define electric force and field (2) Draw electric field lines

AGENDA:
(1) Took 4 slides of notes
(2) Finished the Charging Objects Lab


HOMEWORK:
Wednesday's problems on HW Packet 5-- Electricity Basics

Tuesday, March 8, 2011

Tuesday March 8th

Today's objective: Explain how an object can be electrically charged.

DO NOW:
1. What is the objective of today's class?
2. What unit are we currently in?
3. When you get static shocked, which particle is running through your body?
4. What is one way that you can charge an object by CONDUCTION?

ANNOUNCEMENTS:
- If you missed the Unit 5 Test last Friday, you have until THURSDAY to make it up.
- Notebook checks will be this Friday. I will check the notes from 1/25 - 3/11.
- Interim reports will be distributed on MONDAY. You will need a parent/guardian signature on that interim (worth 30 points). If you don't come to class on Monday, I will mail it home.

CLASS WORK:
We completed the Charging Objects Lab. We will also work on this tomorrow.

HOMEWORK:
Complete Tuesday's problems on HW Packet 5- Electricity Basics.

Monday March 7th

Today's objectives: (1) Define electricity (2) Explain how objects can get charged

Follow the power point below. We took 7 slides of notes today in class:


HOMEWORK:
Monday's problems on HW Packet 5- Electricity Basics

Friday March 4th

Today, we took the Unit 5 Test.

Thursday, March 3, 2011

Thursday March 3rd

THE UNIT 5 TEST HAS BEEN POSTPONED. YOU WILL TAKE THE TEST TOMORROW (FRIDAY 3/4).

Your notebook check will be next week Friday.

DO NOW:
1. When is your Unit 5 Test going to be?
2. When you place a rock on the top of a cliff, it has a lot of ___________ energy. When you knock it down, the PE is changed to ______________ energy.
3. Assuming no air resistance, if you start out with 400 J of PE, how much KE do you end up with?

CLASS WORK:
Solve these problems in your notebook:
1. Calculate the work done when a 20N ball is thrown 5m.
2. Jenny (weight 300N) runs up the 2m stairs in 5s. What was her power output?
3. Mechanical advantage tells you how much easier or faster a machine makes your work. Calculate the mechanical advantage of a ramp that is 15m and 5m high.
4. A toy car with a mass of 2kg is sitting on top of a 4m stool. How much potential energy does it have?
5. Assume no air resistance. Your sister throws a 2kg ball across the room with a speed of 5m/s. How much kinetic energy does the ball have?

HOMEWORK:
Finish the Unit 5 Study Guide (if you haven't already).

Study for the Unit 5 Test tomorrow!

GOOD LUCK!

Wednesday, March 2, 2011

Wednesday 3/2

Today's objective: Continue reviewing for the Unit 5 Test tomorrow.

DO NOW:
1. What is the objective of today's class?
2. You are pushing a table but it doesn't move. Are you doing any work?
3. Your cousin has a weight of 200N. You try to lift him up with a force of 175N. Does it work?
4. True or False: When running, ALL the potential energy in your body gets converted into kinetic energy.

CLASS WORK:
We continued working on the Unit 5 Review Foldable. If you were unable to finish it in class, you are to finish it for homework.

HOMEWORK:
- Finish Unit 5 Review Foldable
- Finish Unit 5 Study Guide
- Study for your test tomorrow!

Tuesday, March 1, 2011

Still confused about Conservation of Energy?

Check out this website!


Tuesday March 1st

Today's objective: Begin review for the Unit 5 Test on Thursday.

DO NOW:
1. What is the objective of today's class?
2. What is the SI Base Unit for distance/height?
3. What is the potential energy of a 20 kg wooden car sitting on a stool 50 cm above the ground?
4. What is the equation for KE?

CLASS WORK: Create a review foldable.
- Fold a piece of white paper in half
- On the front, write the equation and units for WORK. Answer Q 3 and 5 on p 384.
- On the next section, write the equation and units for POWER. Answer Q 1 and 7 on pg. 384
- On the next section, list 3 simple machines and an example. Define mechanical advantage.
- On the back, define energy. List 3 types of energy. Solve Q 23 a, b on p. 411. Solve Q8 on pg. 399.

We will also work on this tomorrow in class.

HOMEWORK:
Questions 1-7 on the Unit 5 Study Guide