How many atoms are in one molecule of magnesium hydroxide: Mg(OH)2 Unit 2: Energy Conservation and Transfer Focus: Geothermal Energy Day 4: 11/16/17 1.Science starter: How many atoms are in one molecule of magnesium hydroxide: Mg(OH)2 2. Copy today’s E.Q. on page 33 NOW!!! Geothermal and wind energy are up next!!!

Wrap-up nuclear energy (Brainpop and Geothermal energy and wind energy Plan for the Day Wrap-up nuclear energy (Brainpop and Geothermal energy and wind energy Notes Videos Political cartoon analysis

Homework 3-column chart or Venn diagram comparing and contrasting geothermal energy and wind energy – 3 similarities and 3 differences. Page 34

5th and 6th - Let’s wrap-up nuclear energy.

REMEMBER: The Law of Conservation of Energy - Energy cannot be created or destroyed, but can change form. *Activity: Uranium is mined out of the earth and used to create electricity. Discuss with your group the energy changes that occur in this process from start to finish. In other words, put these in order: *thermal energy *electrical energy *mechanical energy *nuclear energy

From the Ground to the Home – The Process Uranium is mined from the earth. Uranium is placed into fuel rods which are transported to a nuclear power plant and installed in a nuclear reactor. Inside the reactor, uranium atoms are split through fission. This releases a lot of heat. The heat is used to boil water and turn it into steam. The steam turns the turbines of generators, and electricity is made. The Change Uranium contains nuclear energy. Fission (splitting) of the uranium atoms transforms the nuclear energy into thermal energy (heat...a lot of heat!). The thermal energy (heat) is transformed into mechanical energy as steam turns a turbine. The mechanical energy is transformed into electrical energy (electricity) as the generator operates making electricity.

Let’s watch a Brainpop on Nuclear Energy. Brainpop Nuclear Energy Listen for the following: *Can elements change into other elements? If so, how? *What is the process called when atoms are split to make nuclear energy? What does this produce?

Take about 3 minutes and answer the E. Q. on page 31 RIGHT NOW Take about 3 minutes and answer the E.Q. on page 31 RIGHT NOW!!! Give 2 environmental consequences of each. You may bullet them.

Essential Question – Copy on page 33. What are 2 benefits (advantages) and 2 drawbacks (disadvantages) of geothermal energy and wind energy?

Let’s hear from the geothermal group.

Geothermal Energy Definition: (How It Works) Heat inside the Earth causes water underground to boil; energy companies pipe the hot water and steam to the surface to run turbines of generators or heat buildings directly; cooled water is injected back into the earth and heated again Advantages: *Renewable – water can be re-used *Does not pollute or produce CO2 *Geo power plants don’t take up much room *Little or no other kind of energy is needed to run them Disadvantages: *Foul-smelling gases may be released *Only about 15% efficiency *Only certain places have the heat and hot water under the surface needed *Many people don’t want to live near the geo-power plants (near volcanoes)

Basics about Geothermal Energy Listen for the following: Let’s watch a video on Geothermal Energy. Basics about Geothermal Energy Listen for the following: *What is the source of energy in this technology? *What operates the turbines of the electricity generators? *Why is this energy resource clean and renewable?

What message is this political cartoon trying to send?

Let’s hear from the wind energy group.

Wind Energy Definition: (How It Works) Wind turns the blades of turbines which operate electricity generators. Advantages: 1.Renewable – won’t run out 2.Does not pollute or produce CO2 3.No fuel costs; wind is the “fuel” Disadvantages: 1. Must be built in areas where there are consistent wind patterns 2. Produces a relatively small amount of electricity, so… 3. Vast (huge) areas of land are needed to produce significant amounts of electricity from wind power 4. Wind farms are noisy and unattractive 5. Blades of the turbines can harm species of birds and bats 6. Large storage facilities are needed and backup electricity sources are needed when the wind is not blowing

Some people have found other important uses for wind turbines Some people have found other important uses for wind turbines! A drone caught this man hanging out on a wind turbine.

Brainpop on wind energy Let’s watch a Brainpop video about wind energy. Brainpop on wind energy

Wrap-up What is the most important thing you learned today? Why is this important to you and your world? Be prepared to share.