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Module 2 Review Energy: Everything Has it!. Lesson 2.01 Potential and Kinetic Energy. Key Points: - Potential Energy is more formally called the Energy of Position or Stored Energy. Any object that is still or resting has Potential Energy.
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Lesson 2.01Potential and Kinetic Energy Key Points: -Potential Energy is more formally called the Energy of Position or Stored Energy. Any object that is still or resting has Potential Energy. Potential Energy is converted into Kinetic Energy when an object has force acting upon it. -Kinetic Energy is the Energy of Motion. Any object that is moving has Kinetic Energy. The faster an object travels the more Kinetic Energy it has. Question: Do the examples below display Potential Energy or Kinetic Energy? A cat sleeping. A child running. A car racing. A car sitting in the driveway.
Lesson 2.02The Law of Conservation of Energy Key Points: *The Law of Conservation of Energy says that energy cannot be created or destroyed, but it can be converted from one form to another. *Energy changes form everyday all around us in the following ways: -Chemical energy stored in gas is converted to Mechanical energy as we drive. -Chemical energy stored in our food is converted to Kinetic energy as we move around. -Chemical energy stored in coal is converted into Electricity. -Chemical energy in batteries is converted into Mechanical movement in toys. Question: True or False? A Windmill can convert wind energy into electricity.
Lesson 2.03Energy Conversion Key Points: -Potential Energy can have many forms. *Chemical Energy is potential energy that is stored in chemical bonds. *Nuclear Energy is potential energy that is stored in atoms. *Electric Energy is potential energy that is stored between charged particles. *Magnetic Energy is potential energy that is stored in magnets. -Kinetic Energy usually has just one form. *When objects are moving, they have Kinetic Energy. -We also learned that energy can be changed from one form to another. *Potential Energy can be converted into Kinetic Energy and Kinetic Energy can be converted into Potential Energy. Question: True or False? Kinetic Energy has many forms.
Lesson 2.04Heat Transfer Key Points: Thermal Energy always looks for things to be fair. This means that Thermal Energy moves from an area with a higher amount of thermal energy to an area where there is less. We call this process Heat Transfer. Heat Transfer happens in three different ways: Conduction – when two objects touch each other. Convection – when heat moves through the air or a liquid. Radiation – when heat moves through electromagnetic waves (light). (Such as the sun). Question: Are the examples below showing Conduction, Convection, or Radiation? -Playing outside and getting a sunburn. -Feeling the heater blowing indoors. -Eating a grilled cheese sandwich and burning your tongue.
Lesson 2.05Heat Transfer: Conduction Key Points: -A substance that is good at conducting heat is called a Conductor. Metals like steel, aluminum, and copper are good examples of Conductors. -A substance that is not good at conducting heat is called an Insulator. Some examples of substances that are Insulators include: wood, styrofoam, cloth, and plastic. Questions: Are the following objects Conductors or Insulators? -A metal rod -A plastic toy -A rubber tire -A steel bench
Lesson 2.06Nonrenewable Energy Key Points: -Nonrenewable Energy is energy that eventually runs out. This means that the energy source is in limited supply. We will use up the energy source completely at some point in the future. Oil, coal, and natural gas are all nonrenewable energy sources. -Oil, coal, and natural gas are called Fossil Fuels . They are called fossil fuels because they are made from dead plants and animals that were buried in the ground thousands of years ago. It takes thousands of years for fossil fuels to form. Unfortunately, humans are using up fossil fuels faster than they are re-forming. They also cause pollution but are cheaper to use. Question: Do you think that using Fossil Fuels is the best way to meet our energy needs and why?
Lesson 2.07Renewable Energy • Key Points: • Renewable Energy is energy that never runs out. • This means that we can use this energy source over and over. • Examples include Sunlight, Wind, Water, and Trees. • Renewable energy tends to be more expensive to use because it is found in certain locations but it does not harm the environment. • Question: • What are some ways you could use Renewable Energy in everyday living?
Lesson 2.08Conserving Energy and Resources Key Points: What does Conservation mean? Conservation means a lot of different things to different people. In this situation, Conservation means that we use energy wisely. In other words, we don’t waste energy. How do we Conserve Resources? Conserving Resources is done on many different levels: -Individuals can conserve by not wasting energy. -Communities can use energy-saving devices and find ways to reduce dependence on nonrenewable energy. -Nations can focus on using their nonrenewable resources wisely, while they develop new forms of energy. -Globally, we can commit to decreasing the production of energy from nonrenewable energy resources. Question: Do you have a good Conservation idea?
