S: Water and Wind Power
BC: Did you know? | 1. A wind speed of only 14 miles per hour is enough to change wind energy into electricity. 2. A large wind turbine can produce enough electricity to supply energy to 300 homes. 3. The first modern wind turbine was built in Vermont in the early 1940’s. 4. A simple wind energy machine can be built at home using simple materials. This means wind energy can be produced for very little cost. 5. The largest wind turbine in the world is in Hawaii. It stands 20 stories tall and its blades are the length of a football field. 6. Hydropower provides about 10 percent of the electricity in the United States. 7. The first United States hydroelectric power plant opened on the Fox River near Appleton, Wisconsin, on September 30, 1882. 8. Most of the hydropower in the United States is found in the West. 9. About 29% of the United States’ hydropower was created in Washington in 2011. 10. Hydropower is the least expensive renewable energy source in the USA.
FC: Water and Wind Power
1: What is wind energy? Wind is simply moving air. Wind energy is energy created by the wind.
2: Wind energy has been used for a long time. It is also a renewable energy and costs less than other energy sources.
3: For example, as long as the sun is shining, there will be wind and it is free. Wind energy is safe for the environment.
4: Energy that comes from the wind can be changed into electricity by generating a constant supply of wind using wind machines. These wind machines are called wind turbines and are similar to windmills.
5: Imagine a fan. Fans use electricity to make wind.
6: Wind turbines work in the opposite way. They use the wind to make electricity.
7: In order to create enough energy to power many homes, dozens of wind turbines are set up in large spaces of land called wind farms. Wind energy is renewable, safe, and very cool.
8: What is hydropower? Hydropower is energy created by water.
9: Hydropower is also a renewable energy. As long as there is water, there will be hydropower.
10: Hydropower has been around the longest of all energy sources. Thousands of years ago this type of energy was used to power paddle wheels for grinding grain.
11: Hydropower was not a well known source of energy until the technology was created to move large amounts of water over long distances.
12: In order to understand hydropower, you have to understand the water cycle. The water cycle is created by the sun heating the water on the earth's surface. This causes water vapor.
13: Water vapor then condenses into the clouds and returns to the earth's surface in the form of precipitation such as rain, sleet, or snow. The precipitation flows back into the rivers and oceans where the cycle starts over again.
14: The energy created by moving water is based on the flow or fall of the water. The speed of the flow or fall then moves through a pipe that turns the blades in a turbine to run a generator that eventually creates electricity.
15: Water dams are used to collect and store extra water until it is needed to create electricity. Water energy is renewable, safe, and amazing.