Essential Question: How can energy be transferred?
GOALS: SWBAT...
1. list four rules for knife safety
2. Assess current knowledge of simple machines
3. Define "machine", and the six types of simple machines
4. Compare and Contrast the three classes of levers
WARM-UP
1. What kind of simple machine is a knife?
2. List four knife safety rules.
CLASSWORK
Notes:
In order to build your Rube Goldberg Machine, and test it, you'll need to go through the knowledge building process, and the design process. Knowledge building is what you did earlier this week, and may continue today. Depending on where you are progress-wise, you may start your design today or Thursday.
1. 121A: Knife Safety Notes (5 min)
- Using a knife has similar safety restrictions as using scissors.
- always cut away from your body
- if using a pocket knife or boxcutter, retract the blade when not in use
- walk with the knife pointed down, by your side
- dull knives require additional pressure. Be extra careful with those.
- do not cut items in your hand. Cut items on a firm surface that doesn't mind getting scratched (old table, table with a towel on it, etc)
2. 121B: 6 Simple Machines & 3 Classes of Levers Notes (10 min)
This is a simple self-assessment of what you know at this point:
1. From memory, list the six simple machines, and describe how they work
2. From memory, describe each of the three classes of levers
Check your knowledge:
Great definitions of five of the six simple machines. https://www.explainthatstuff.com/toolsmachines.html
Good for examples and alternate definitions of machines. Includes a good definition of 'inclined plane' that isn't in the first
link: http://idahoptv.org/sciencetrek/topics/simple_machines/facts.cfm
Even more definitions: https://www.school-for-champions.com/machines/levers_classess.htm#.XJAOQuHYrnF
3. 121C: Design
You should come up with ideas for the task of your machine, and the energy transfers your machine will use.
Your design should be drawn, either using a sketch program on your computer, or via hand-drawing.
Designs should include:
list of materials
dimensions
methods of attachment for each object
energy transfers between stages
labels for each material
each of the 6 simple machines
LEARNING AT HOME
1. Quiz on 6 simple machines, 3 classes of levers, and knife safety this Friday
2. Complete any portions of Day 117, 118, or 119 that are unfinished. Those steps are your checklist to begin building
Essential Question: How can energy be transferred?
GOALS: SWBAT...
1. show complete design, including all requirements listed below
2. begin building
WARM-UP 121
1. What tasks do you still need to complete from Day 117-120?
2. What is the task of your machine?
3. Will your machine fit in the board on my podium?
CLASSWORK
1. 120A: Design
Your group should come up with ideas for the task of your machine, and the energy transfers your machine will use.
Your design should be drawn, either using a sketch program on your computer, or via hand-drawing.
Designs should include:
list of materials
dimensions
methods of attachment for each object
energy transfers between stages
labels for each material
each of the 6 simple machines
not sure how to incorporate something like a screw into your machine? Here's link: http://lmgtfy.com/?q=screw+rube+goldberg or an alternate link: https://www.google.com/search?q=screw+rube+goldberg
Prior to getting building materials, you'll need to get your design checked by me.
My expectation is that most groups will finish their design, and begin building, today.
2. 121A: Work Time
Before you get materials, you must be done with Day 117 (all three assignments), and your design must be approved by me.
Materials are organized on the demo desk. Whatever you take, make sure you put back in the same place
Materials under the demo desk are reserved for other periods and for other days of building.
Before you use something, make sure you've measured twice. Once you cut, it's over... ;-)
LEARNING AT HOME
1. Complete any portions of Day 117-120 that are unfinished. Those steps are your checklist to begin building.
EXTRA CREDIT OPPORTUNITY:
Want some? Our Rube Goldberg project is materials heavy, so, if you'd like to donate some common materials to class, I will reward your support with points.
Things which are larger, or more expensive (boxes, glue sticks, springs) will get more points per item than something small and cheap (one used Hot Wheels car, for example)
Here's what we need, preferably on Monday (03/18/19) or Tuesday (03/19/19). Keep in mind that this is a live list - I'll take things off the list if we have enough of that material. Also, if you think of something, and are wondering if it might be useful, just ask in class or via the Remind App:
Moving size (approx 18x12x12" or larger) boxes. Used in good condition is great.
springs
hot glue sticks (like these: https://www.amazon.com/Diameter-Compatible-Industrial-Adhesion-Quickly/dp/B07GTJ88KT/ref=sr_1_7?keywords=hot+glue+sticks&qid=1552582849&s=gateway&sr=8-7)
used matchbox size cars/trucks that roll well (they can be beat up cosmetically)
tubes (from toilet paper or paper towel)
gear sets and or motors (like these: LINK)
string/yarn/string
marbles
binder clips
CD's (used is fine)
screws
small nails
masking tape (brown or blue)
Unit Schedule
Mon: Background knowledge.
Tue: knife safety, (what kind of simple machine is a knife?)
simple machine lecture
Bring materials for your group, or for the class (extra credit if it's for the class)
Design time
Wed: Simple Machine Quiz
Design time (possibly building time)
Thurs: Design, Building, & Testing
Fri: Paper guidelines
Building & Testing & Paper writing
Mon: Building & Testing & Paper.
You can do your final run of your machine (for a grade) starting this day
Tues: Last day to do your final run, for a grade
Paper due by 11:59pm
Wed: Exam. Intro to next unit