## Lesson 4: Research and Evaluate the Impact on the Environment and Society of Converting Natural Resources into PV Cells

1. Students will evaluate information to describe the impact on society from resource extraction and materials-processing for PV cells.

2. Students will communicate their understandings of different impacts from converting natural resources into PV cells through participation in a Socratic Seminar.

Students will engage in guided research to explore resource acquisition, material processing, and electricity generation associated

## Lesson 5: Engineering a Hot Pack

Students will collect data to characterize a chemical reaction

Students will identify the criteria and constraints of an engineering challenge.

Students will design and build a hot pack that meets the criteria of the project.

Students will collect data to support their proposed design.

Through a series of inquiry activities, students will discover the properties of the chemical reaction of dissolving CaCl

## Let's Build Sun Ovens (Lesson 9)

Students will follow written directions and use what they have learned about necessary components of a solar oven to build three different ovens in small groups.

The purpose of this lesson is to introduce the students to three different styles of inexpensive solar ovens. Students will work together to build a File Box oven, an auto shade/bucket oven and a “Copenhagen” style oven. Students will follow written directions and use what they have learned about the necessary components of a solar oven (... View full description >>

## Let’s Get Cooking! (Lesson 10)

At the end of this lesson students will be able to: • Follow and prepare a recipe for cookies. • Learn to take and record oven temperature every 30 minutes using an infrared thermometer. • Evaluate the three ovens with a pros and cons list for each one after cooking. • Write one or two of their own questions. • Make suggestions for design changes.

The purpose of this lesson is to provide students with a hands-on experience using the sun to cook cornbread or cookies. Students will also learn to use an infrared thermometer. There is also an optional extension for the class or individual students to design and build the ultimate solar oven. View full description >>

## Light Is Transformed into Heat (Lesson 6)

Students will experience how some materials absorb heat from the sun and other materials reflect the sun and stay cool.

When absorbed (not reflected), light seems to disappear. What happens to it? View full description >>

## Macro-Scale Solar (Lesson 2)

Students will be able to describe the basic structure of a photovoltaic solar module implementing the ideas of series and parallel wiring. Students will be able to describe the basic structure of a photovoltaic solar array implementing the ideas of series and parallel wiring. Students will be able to describe the function and necessity of an inverter when using photovoltaic arrays.

This lesson begins with basic chemistry with regards to atomic structure. The lesson then moves to understanding the special properties of silicon as a photoelectric semi- conductor. Building on this, the basic structure of photovoltaic solar cells is described in detail. View full description >>

## Making Observations and Recording Data for Solar Powered Water Pumping (Lesson 5)

Students will be able to make observations and record data about how quickly a solar module will drive a pump to move water.

Students use a solar module and water pump to test how quickly one cup of

water can be pumped. View full description >>

## Measuring Voltage Using a Microcontroller (Lesson 1)

Students will apply Ohm’s Law. Students will use a multimeter to measure current, voltage, and resistance. Students will use a breadboard to set up a series circuit. Students will read circuit diagrams. Students will calculate times for an RC circuit to change state. Students will prove that resistors in series have an equivalent resistance equal to their individual sums. Students will program the Basic Stamp to measure voltage levels in a voltage divider and RC circuit.

In this lesson students will be introduced to series circuits, resistors, a photoresistor and a microcontroller. There’s a lot here, but it boils down to making a voltage divider circuit and measuring the voltage at different points. A second circuit includes an RC component. Teachers can edit this down to just a photoresistor if time and/or... View full description >>

## Mini Solar Houses Unit

1. Students will understand how to use an Azimuth finder to determine the direction and altitude that solar modules will face.

2. Students will learn how to describe why a solar module is pitched at a particular angle.

3. Students will understand how to measure the voltage and current for an electrical energy source.

4. Students will learn how to build a circuit that will light a light bulb with a switch and without a switch.

5. Students will understand that the electricity flows through a circuit from an energy source to a load.

6. Students will understand the difference between open and closed circuits.

7. Students will understand the similarities and differences between solar cells and batteries as an energy source.

8. Students will understand how electricity flows through a circuit (from energy sources to loads) with more than one source and more than one load.

9. Students will understand how to build series and parallel circuit and the characteristics of each.

10. Students will learn to power both a light and a fan.

11. Students will learn how to find a fault in a circuit.

12. Students will understand that the electricity flows through a circuit from an energy source to a load.

13. Students will understand the difference between open and closed circuits.

14. Students will identify the causes and solutions to various complications that arise in the construction of circuits.

15. Students will use the design process to create a roof to hold an adequate number of solar modules to power an LED and a fan.

16. Students will understand how to make a geometric net (a 2D drawing that when folded creates a 3D shape) for designing a roof.

In Lesson 1, the lesson focuses on understanding how the angle and orientation affect the amount of energy that is generated through use of a solar cell. Paper azimuth finders, Keva Planks, and multimeters will be used in order for students to draw conclusions about the optimal placement of a solar cell. This lesson will prepare students for... View full description >>

## Non-renewable Energy/Global Warming/Pollution (Lesson 3)

Students will explore why there is a need for energy efficiency and renewable energy. Students will determine how non-renewable and renewable energy are a part of our lives. Students will understand how the greenhouse effect and nonrenewable energy sources relate to climate change.

This lesson will introduce the students to worldwide problems that we have with energy. (91% of the energy we use is non-renewable, 9% of the energy we use is renewable). Students will explore the greenhouse effect as part of this lesson and relate this process to climate change. View full description >>