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Revision Lesson Energy PowerPoint 2 Sci 6.4 (1)

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Each student was assigned a energy type and tasked to create a poster illustrating and explaining the energy type.

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Sample Energy Type Poster from a Student

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Sample Energy Type Poster from a Student

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Each student was assigned a energy type and tasked to create a poster illustrating and explaining the energy type.

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Sample Energy Type Poster from a Student

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Sample Energy Type Poster from a Student

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21313083 Links to JC Key Skills and Principles

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Activity: What type of light bulbs are present in your home? 

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Activity: What type of light bulbs are present in your home? 

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Comparing LED vs CFL vs Incandescent Light Bulbs Article

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Comparing LED vs CFL vs Incandescent Light Bulbs Article

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LED VS CFL Brightness
Are LED lights brighter than or equal to Compact Fluorescent (CFL) bulbs? The trick is to understand the technology. In short, LED and CFL as technologies do not have a difference in brightness intrinsically. Brightness is determined by lumens. Lumens is best described as the measurement of light. A single CFL and LED bulb might have the same lumen (brightness) output but vary greatly in the amount energy needed to generate that level of brightness.

Many LED bulbs in the past were not omnidirectional which gave the upper hand to CFL in various scenarios. For example, in a floor lamp, a CFL would perform better because of the light coverage was, at the time, much broader. In most recessed lighting (ceiling), however, the LED would have greater efficacy. Fast forward to new LED generations, and we see the little light-emitting diodes surpassing CFLs in overall energy consumption, color and even becoming more competitively priced in the marketplace.

Lumen & Wattage Comparison

The chart below illustrates the amount of brightness in lumens you can expect from different wattages of light bulbs. LED bulbs require much less wattage than CFL or Incandescent light bulbs, which is why LEDs are more energy-efficient and longer lasting than their competitors.

How to understand this table - look at the lumens (brightness) in the far left column, then compare how many watts of power each light bulb type requires to produce that level of brightness. The lower the wattage needed, the better.

To compare different light bulbs, you need to know about lumens. Lumens, not watts, tell you how bright a light bulb is, no matter the type of bulb. The more lumens, the brighter the light. Labels on the front of light bulb packages now state a bulb's brightness in lumens, instead of the bulb's energy usage in watts. When shopping for your next light bulb, simply find the lumen output you're looking for (the bigger the brighter) and choose the bulb with the lowest wattage (the lower the better).

Are CFL or LEDs more cost-effective?

To examine the cost comparison, let's take a look at a standard 60-watt replacement incandescent bulb in this example. The energy consumption to use a bulb like this would cost about $90 over the course of 10 years. For an LED, running over the course of 10 years the actual cost would be only $18 to operate. Take a look at the table below for a breakdown.
Winner: LED (in the long run)
The above chart shows a clear-cut winner when considering the price over time with energy consumption factored in. In addition to LED's cost savings, there are also government-backed rebates in some scenarios for Energy Star products.
Do CFL or LED bulbs last longer?
Although LED technology for use in bulbs has not been on the market for long, the lifespan estimates for the new technology are astounding and leave CFL and incandescents with little to show for in comparison. With an astonishing lifespan of 25,000 hours, LED light bulbs are the undisputed, heavyweight champion in longevity. The next best are CFL bulbs which bring in a respectable 8,000 hours of average life expectancy. Keep in mind, most tests are based on a running time of 3 hours per day.

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Comparing LED vs CFL vs Incandescent Light Bulbs

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3 minute read - The Ultimate Guide by VIRIBRIGHT (Charts, Tables, and more) Over the years, advances in technology have brought about innovations in how to light our homes and commercial buildings. In the beginning, all we had was the standard, incandescent light bulb.

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With today's global energy crisis resulting in high prices and shortages that are hurting consumers, businesses and entire economies, it has never been more important to use energy more wisely. We can do this through simple changes in behaviour and habits to consume less energy in our daily activities. We can also save energy by investing in more energy efficient products that reduce both our energy bills and our environmental footprint.

Today's energy shortages and high prices makes it more important than ever to use energy wisely

7 ways you can save energy

Learn more on how to save energy

Lower your thermostat by just 1°C to save around 7% of your heating energy and cut an average bill by EUR 50-70 a year. Always set your thermostat as low as feels comfortable, and wear warm clothes indoors. Use a programmable thermostat to set the temperature to 15°C while you sleep and 10°C when the house is unoccupied. This cuts up to 10% a year off heating bills. Try to only heat the room you're in or the rooms you use regularly.

The same idea applies in hot weather. Turn off air-conditioning when you're out. Set the overall temperature 1 °C warmer to cut bills by up to 10%. And only cool the room you're in.

1. Heating: turn it down

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With today's global energy crisis resulting in high prices and shortages that are hurting consumers, businesses and entire economies, it has never been more important to use energy more wisely. We can do this through simple changes in behaviour and habits to consume less energy in our daily activities.

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Links to other Learning outcomes Explained

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Links to other Learning outcomes Explained

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Links to other strands and learning outcomes

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NoS3: Students should be able to design, plan and conduct investigations; explain how reliability, accuracy, precision, fairness, safety, ethics, and selection of suitable equipment have been considered.

NoS5: Students should be able to review and reflect on the skills and thinking used in carrying out investigations and apply their learning and skills to solving problems in unfamiliar contexts.

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Example Lesson Plan  (Energy lesson 16 2Sci-5.7) 

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Note 1: Radiant energy = Light energy
Note 2: We do not cover elastic and mechanical energy in our unit but they are covered in this video

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Name an appliance and the energy change that occurs

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Name an appliance and the energy change that occurs

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PW6: Students should be able to explain energy conservation and analyse processes in terms of energy changes and dissipation.

PW 7: Students should be able to design, build, and test a device that transforms energy from one form to another in order to perform a function; describe the energy changes and ways of improving efficiency