Student Projects

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Balance of Rates: A Thought Experiment

Keywords: carbon emissions, rates, unbalanced rates

We often look at the number of tonnes of carbon dioxide we emit into the atmosphere for a given activity. But what if it's not a question of how much- but rather, how fast?

We are pumping tens of billions of tonnes of carbon dioxide into the atmosphere each year. In contrast, the naturally occurring exchanges of carbon dioxide happen in the hundreds of billions of tonnes. Does this render our human activity insignificant? In this activity, we explore how even small differences in a balance can cause a large influence over time.

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1 year 22 weeks ago

Capturing Solar Energy with Photovoltaic Cells

Keywords: Lend an Experiment (LEx), photovoltaic cell, photovoltaics, resistance, solar, solar cells, solar energy

Did you know that the amount of power from a solar panel depends on what it's connected to? Explore how photovoltaic panels work, converting light into electrical energy, and learn how you can find the maximum power output from a solar panel.

This activity is part of the LEx (Lend an Experiment) Climate Kit. Students use solar panels to generate electrical power, exploring how light energy can be turned into electricity. Students connect the photovoltaic cells to different loads to find their peak power output.

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1 year 23 weeks ago

Generating Electricity: Wind and Water

Keywords: electricity, electricity generation, hydro-electricity, Lend an Experiment (LEx), wind, wind energy, wind turbines

A match made in energy heaven, wind and water are wonderful sources of clean, renewable energy. Let us see what goes into this electricity generation by making some wind and water turbines ourselves!

This activity is part of the LEx (Lend an Experiment) Climate Kit. Students generate their own wind or hydro electric power by constructing wind/water blades, exploring how mechanical energy from external sources can be harnessed and turned into electrical energy. The effect of different gear ratios can also be explored.

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1 year 24 weeks ago

Investigating the Greenhouse Effect and Passive Solar Heating

Keywords: greenhouse effect, Lend an Experiment (LEx), thermal absorption

We all know a car sitting outside in the sun all day can get dangerously hot inside, but why? What does this have to do with the greenhouse effect?

This activity is part of the LEx (Lend an Experiment) Climate Kit. Students explore the way materials and surfaces interact with solar radiation. We introduce the idea of the greenhouse effect, and build a small model to illustrate how it works.

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1 year 31 weeks ago

Light Bulb Efficiency and Hand Crank Energy Generation

Keywords: breadboard, circuit, efficiency, electricity generation, energy, energy conversion, Lend an Experiment (LEx), lighting

What does it really take to power a light bulb?

This activity is part of the LEx (Lend an Experiment) Climate Kit. Students compare the power consumption of incandescent and LED bulbs through the use of hand crank generators and a simple circuit. Concepts include the conversion of mechanical to electrical energy, power and efficiency, and measurement estimation. There is an option to also investigate the efficiency of the hand crank generator.

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1 year 35 weeks ago

Light Theremin (Advanced)

Keywords: Generate Sine Wave, Light Sensing Instrument, Light Theremin

Is it possible to create a musical instrument that can be played without direct contact?

A more complicated version of the simple Light Theremin. This version uses another light sensor for volume control, and sounds much closer to the original Capacitive Theremin.

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3 years 38 weeks ago

Light Theremin (Simple)

Keywords: Hands-Free, Light Theremin, Lights Sensing Instrument

Is it possible to create a musical instrument that can be played without direct contact?

This project takes the student through the steps to build a simple Light Theremin, an instrument which changes its pitch depending on how much light is shone upon it.

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3 years 38 weeks ago

C21 Video Contest Top Videos

4 years 11 weeks ago

Stretching Rubber Bands

Keywords: Elasticity, Hooke's Law, Rubber bands, Young's Modulus

Why is this energy bar hanging from a rubber band?

In this project you will explore the elastic properties of rubber bands.

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4 years 11 weeks ago

Laminar (Un)mixing

Keywords: activity, fluids, laminar flow, mixing, reynolds number

"Unmixing" a mixture is impossible, right? So what's going on here?

Find out how to construct your own "(un)mixing" demonstration and learn about how it works here.

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4 years 22 weeks ago
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