Mr. Sparks

Culmback Dam Spada Lake

Henry M. Jackson Hydroelectric Powerhouse

Does wind have power?

…But can we capture that wind power to generate electricity? Can I get a volunteer?

What are these things? What do you notice?

Some turbines are really big!

Some turbines are really small!

Why would we want to build wind turbines today?

Advantages of using wind to generate electricity? Disadvantages of using wind to generate electricity?

Today we are going to: Think, talk and work like scientists 10 teams - do 5 different experiments at the same time/2 trials at each table Present your findings Divide into 5 teams of engineering experts Design & build a turbine A water pumping contest

The Scientific Method Q P M D C

The Scientific Method Question Prediction Materials Procedure Data Conclusion

What is a variable in a scientific investigation? A variable in a scientific investigation is something that can vary, or change.

With the help of your team, fill in the first blank line of your paper with your team's changed (manipulated) variable. Hint: What does the title on your paper say you are testing? Also, check the data chart for the answer.

Testing Teams What is your changed variable? Teams 1 and 2 will test Number of Blades Teams 3 and 4 will test Pitch (angle) of the Blades Teams 5 and 6 will test Mass (weight) of the Blades Teams 7 and 8 will test Length of Blades Teams 9 and 10 will test Shape of the Blades

Make your team's prediction. With your team... Make your team's prediction. (be sure to circle the terms, “increase” or “decrease” or “more” or “less”)

As you are testing your blades… 1. Safety!!! Do not stand to the side of the blades! 2. Remember to fill in data chart. 3. Compare your data with your partner team? 4. Run trial two if you have time. After you are finished testing your blades… 5. Put all materials back into your box. 6. Work together to finish writing the conclusion. 7. If you finish early, complete the answers to the questions on the back.

There are three types of variables in a scientific investigation... Changed (manipulated) Measured (responding) Controlled

Changed Variable... (also called the “manipulated variable”) It's the one we change on purpose. It's what we are testing. We can choose what the changed variable will be. There can only be one!

Measured Variable... (also called the “responding variable”) is the result our investigation gives us. It has to be measured. It's our data.

Controlled variables... the ones we must keep the same. There will be many controlled variables.

“How do different brands of dog food affect the growth rate of dogs?” Sample Investigative Question... “How do different brands of dog food affect the growth rate of dogs?” The changed variable is the of dog food The measured variable is the dogs' . One of the controlled variables could be the same of food for each dog tested.

“How do different brands of dog food affect the growth rate of dogs?” Sample Investigative Question... “How do different brands of dog food affect the growth rate of dogs?” The changed variable is the brand of dog food. The measured variable is the dogs' growth rate. One of the controlled variables could be the same amount of food for each dog tested.

Purina Iams Alpo Pinnacle Halo 1 lb/day

Purina Iams Alpo Pinnacle Halo 1 lb/day .75 lb/day 0.5 lb/day 0.375 lb/day 0.25 lb/day

Purina Iams Alpo Pinnacle Halo 1 lb/day

Hint: The data chart shows the answer!) With the help of your team, fill in the second line of your paper with your team's measured (responding) variable. Hint: The data chart shows the answer!)

Using the information below, fill in your team's controlled variables Mass = 0 clips Angle = 30° # of blades = 3 Shape = (look in your box) Length = just write “all the same”

Is a wind turbine a system? Energy Inputs? Energy Outputs?

If the magnet or wire moves, an electric current will be generated! How does a generator generate electricity? If the magnet or wire moves, an electric current will be generated!

Your new job is to be part of an expert engineering team that must design and build the very best set of wind turbine blades. You cannot do this alone, therefore success depends on all you experts working together.

Your Engineering Jobs: Listen to each other as you share your data and recommendations with your team. Record your team's decisions on the giant poster. (Use the data to make your decisions!) As a team, complete a design plan on the poster.r data Some of you will draw the diagram, others will start drawing and cutting out the blades. Remember, craftsmanship is important! Have an adult do your gluing! Test/modify your prototype. Can you increase electrical output?

Blade Competition

We will now use our turbines to generate electricity. That electricity will be used to power an electrical water pump. That pump will pump water into a graduated cylinder. Let's see which team can pump the most water!

Blade Competition Team Time(seconds) mL H2O 1 50 2 3 4 5

What creates wind?

Wind Energy is KINETIC ENERGY Kinetic energy is the energy of MOTION Wind is…….. AIR IN MOTION

How is a wind farm part of the entire electricity-generating system?

Discussion Questions What variable has the greatest impact on power output? Can the data we collected today be related to full scale wind turbines? How? What are some advantages and disadvantages of wind power? What is the one thing you will remember the most about today’s lesson?