Clear desks and prepare for your quiz.

Field Trip Reminder

• List is posted in hallway…be sure you know which day you are going and if you are on the 8:30 or 9:30 bus!!!

• EVERYONE MUST BRING A BAG LUNCH ON THE FIELD TRIP

• If you are going on BUS 1 (8:30), report to Ms. Woods room after putting anything you are not bringing with you in your locker.

• If you are going on BUS 2 (9:30), report to Mr. Hebble’s room for homeroom and an activity before going on the field trip.

• If you are not going on the field trip, you will either be reporting to Mrs. McGrath, Mrs. Myers, or Mrs. Tang’s room for homeroom. They will post lists or share with you where to report soon.

Today’s Agenda

• Warm-Up: Clear Desks for Quiz 2• Classwork:

– Science Quiz 2: pH, Acids and Bases– Complete Key Question 13– Introduce Project (Electromagnet

Fishing Pole)

• Homework:– NONE!!!

• Conclusion:– What is pH?

Student ObjectiveThursday, April 20, 2023

Students will be able to…

•Demonstrate what they have learned about pH, Acids and Bases.

Quarter 3 Science Quiz

2

Science Quiz 2

10 Points

What is pH and how is it

determined?

KEY QUESTION 13: What is pH and how is it determined?

•Define pH and explain what pH stands for.

•pH is a measure of how ____________ or ___________ a substance is.

•pH stands for ________________ of __________________.

•Describe the pH scale and explain what it measures.

•The pH scale ranges from _____ to _____.

•It measures how many ___________________ atoms or ___________________ groups are in a substance.

•Identify the characteristic properties of acids and bases.

•Acids have a pH range from _____ to _____, bases have a pH range from _____ to _____, and neutrals have a pH of exactly _____.

•List the properties of acids and bases in the table below:

•Define indicator, provide 2 examples of substances that are indicators, and explain how they work.

•An indicator is a substance that ____________________________ in acids and bases.

•Red cabbage juice is an indicator that changes _______________ in acids and ______________ in bases.

•Other indicators include…_____________________________________________________________

ACIDS

BASES

Electromagnet Fishing Derby 2010PROJECT PART POINTS DUE DATE

Fishing Pole with Magnet 3 POINTS Monday, 3/8 Working Switch 3 POINTS Monday, 3/15 Initial Electromagnet 3 POINTS Monday, 3/22

WILL CONSTRUCT THIS IN CLASS (Do not do ahead at home!) Modified Electromagnet 3 POINTS Friday, 3/26 Finished Electromagnet Fishing Pole 3 POINTS Wednesday,

3/31 Project Worksheet 5 POINTS Wednesday, 3/31

OBJECTIVES: After completing this project, students will be able to…

•Construct a switch and use it to complete a simple circuit.

•Identify the parts and build a simple electromagnet.

•Modify the strength of an electromagnet by changing several variables.

This project is worth 20 points and has multiple checkpoints (due dates) throughout the course of the project. Students failing to complete the work required at each checkpoint will have difficulty achieving a passing grade on this project. Please read over the project rules, regulations, and expectations carefully and ask questions about anything you do not understand.

Project Rules, Regulations, and Expectations

•Students will design and construct an electromagnetic fishing pole. The challenge is to build a pole that will pick up the greatest amount of mass (paperclip fish) in a set time limit.

•The fishing derby will be a 2-part contest.

•In the first portion, all poles will attempt to catch the greatest mass of fish with a single “cast”.

•In the second portion, all poles which meet the dimension requirements will compete in a 1-minute fishing derby to catch the greatest mass of fish out of a large “lake”. Top entries from each class will compete against each other for the top prize!

•Poles must meet the following dimensional requirements:

•Distance from energy source to end of pole must be at least 1 meter (100 cm).

•POLE MUST BE AT LEAST 1 METER AND BATTERY SHOULD BE AT THE BOTTOM

•Fishing line (wire) must extend down from end of pole to electromagnet (hook) a minimum of ½ meter (50 cm).

•Your wire will run from the battery at the bottom of the pole, up to the end of the pole and then must hang down a minimum of 50 centimeters to your electromagnet.

•ALL POLES MAY ONLY USE 1 D-Cell BATTERY AS THE ENERGY SOURCE!

•You may use a battery clip so you can change your battery, or you can attach more than one battery and move your wires to a fresh source.

•You can’t attach 2 or more batteries in series to increase the strength of your magnet (this is the one variable you may not modify!)

PROJECT STEP DIRECTIONSSTEP 1 – FISHING POLE WITH MAGNET 3 POINTS DUE: 3/8/2010

•Choose an object (pole) that is at least 100 centimeters long to become your fishing pole. It should be something that you can cut, glue, tape, screw, etc. without worrying about damaging.

•Find a piece of string or other flexible material (ribbon, fishing line, etc.) and attach it to the end of the pole.

•Tie a magnet to the free end of the string so that it hangs down at least 50 cm.

•CONGRATULATIONS…YOU HAVE COMPLETED STEP 1!

STEP 2 – WORKING SWITCH 3 POINTS DUE: 3/15/2010

•Demonstrate your knowledge of wiring and circuitry by building a simple switch to allow you to turn on and off your electromagnet.

•The switch can be made using any materials you wish, but it should be freestanding and able to be attached to your fishing pole when the time comes.

•Leave at least a 6” wire lead coming from both ends of your switch.

•YOU MAY NOT USE A STORE BOUGHT SWITCH!

•Your switch will be tested in class to prove that it works with a D-Cell Battery and Mini-Light Bulb.

STEP 3 – INITIAL ELECTROMAGNET 3 POINTS DUE: 3/22/2010

•WE WILL BE CONSTRUCTING THIS IN CLASS

•If you can provide 1 D-Cell Battery, an Iron Bolt or Nail, and/or Thin Insulated Wire (at least 1 meter in length) it would be helpful.

PROJECT STEP DIRECTIONSSTEP 4 – MODIFIED ELECTROMAGNET 3 POINTS DUE: 3/26/2010

•Modify your initial electromagnet to make it stronger for the contest.

•Change only one variable at a time and test/record your results on the project worksheet.

•You must make at least 3 modifications to your electromagnet.

•Keep in mind that as your battery is used, the electromagnet will lose some of its strength.

STEP 5 – FINISHED ELECTROMAGNET FISHING POLE 3 POINTS DUE: 3/31/2010

•Put it all together and complete your working electromagnet fishing pole.

•It must be with you in class and working on the day of the class fishing derby.

•Connect your switch and D-Cell battery to the handle portion (bottom) of your pole.

•Remove the permanent magnet from the pole created in step 1 and tie your electromagnet on to the end of the string (be sure it remains at least 50 cm from the end of your pole).

•Run wires to connect all your parts in a complete circuit and test that it works. DO NOT TEST IT TOO MUCH UNLESS YOU PLAN ON REPLACING YOUR BATTERY BEFORE THE CONTEST!

STEP 6 – PROJECT WORKSHEET 5 POINTS DUE: 3/31/2010

•You need to complete the project worksheet as you complete each step of this project.

•Parents will sign-off that you have met some of the requirements and your teacher will check other sections.

•Record the variables you modify and results during STEP 4.

•Complete the CONTEST DAY section during class on the contest day and turn in your completed worksheet.

HOMEWORK

Project Step 1: Due MONDAY!

Field Trip – Thursday & Friday

Always copy daily homework into your agenda.

What do you think you will use for the pole of your electromagnet fishing

pole? 25% 25%25%25%

???

A. WoodB. Metal or Plastic PipeC.Actual Fishing PoleD.Something Else