Get Ready for Unit 4 – Review Answers

Concept Check #1 - 3

Concept Check #1a Electrical energy can be changed into other forms of energy. What is another word for changed? Answer: Transformed

Concept Check #1b What type of electrical energy is the build-up of an electrical charge on the surface of an object? Answer: Static

Concept Check #1c What type of electrical energy can be described as the movement of electrical charges? Answer: Current

Concept Check #1d In which type of circuit is there a single path for charges to flow? Answers: Parallel

Concept Check #1e In which type of circuit are there two or more paths for charges to flow? Answer: Series

Concept Check #2 Examine the picture below (bottom of your sheet). Identify materials that are either insulators or conductors of electricity. Record your answers in a two (2) column chart with the headings Insulating Materials and Conducting Materials.

Concept Check #2 Insulating Materials 1.Wood Tables 2.Rubber Tires (Wheel Chair) 3.Plastic Seat 4.Plastic Containers 5.Soles of shoes (rubber) Conducting Materials 1.Fork, knives & spoons (meta) 2.Chairs (metal legs) 3.Light bulb 4.Wheel Chair (metal frame & tires) 5.Water

Concept Check #3a In an MP3 player, into what form of energy is electrical energy converted? Answer: Sound Energy

Concept Check #3b Into what forms of energy is electrical energy converted in a toaster oven? Answer: Heat Energy

Concept Check #3c Into what forms of energy is electrical energy converted in a TV set? Answer: Light Energy

Concept Check #3d You turn on a blender to make a milkshake. Into what forms of energy is electrical energy converted? Answer: Mechanical Energy

Inquiry Check #4 -5

Inquiry Check #4 You predict that a rubber balloon will allow a static charge to build up on it, if the balloon is rubbed with another object. Design a test you could perform to show the balloons ability to hold a static charge Answer: Test to see how long a balloon will hold its static charge – time how long the balloon will remain on the wall

Inquiry Check #5a Which circuit, A or B, is a series circuit? Answer: Circuit B, because there are multiple pathways for the current to flow

Inquiry Check #5b Which circuit has two loads (electrical devices)? Answer: Circuit A has two (2) loads – 1) Light Bulb & 2) Coffee Maker

Inquiry Check #5c One of the circuits shows how electrical energy flows in our homes. Identify this circuit. Answer: Circuit B, because we have multiple electrical devices in use at the same time

Inquiry Check #5d In which circuit will all loads (electrical devices) stop working if one of the loads burns out? Answer: Circuit B, because all the loads (light bulb, coffee maker & refrigerator) all ru off the same circuit

Numeracy and Literacy #7 - 8

Numeracy and Literacy #7a When are the most expensive times for electricity use? Answer: Most expensive times are – Summer Weekdays (May 1 st – Oct 31 st ) 11AM – 5PM, Winter Weekdays (Nov. 1 st – April 30 th ) 7AM – 11AM & 5PM – 8PM

Numeracy and Literacy #7b When are the least expensive times for electricity use? Answer: The least expensive times for electricity use is Weekends and Holidays, all day during non-peaks hours (0.04 cents/kwh)

Numeracy and Literacy #8 Write a one (1) minute school PA Announcement encouraging students and staff to reduce their daily electricity use.

Numeracy and Literacy #8 Dear Staff and Students, In order to make our planet greener and more environmentally friendly, please turn off all electrical devices when not in use. By doing so, not only will this reduce your bill, but also lower the use of electricity, putting less of a strain on our energy providers. Thank you. And, as always, have a wonderful day. Stay green Bosco!