Energy Resources and Fossil Fuels. Standard: SEV4a: Differentiate between renewable and nonrenewable resources  Goals for today: 1. What is energy? 2.

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Presentation transcript:

Energy Resources and Fossil Fuels

Standard: SEV4a: Differentiate between renewable and nonrenewable resources  Goals for today: 1. What is energy? 2. What are the types of energy?

Before we begin….  What do you see?

What is energy?  power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines

 Fact or Fiction?: Energy Can Neither Be Created Nor Destroyed  Fact: energy always conserved and converted into new forms

Types of energy  Potential  Stored energy  Kinetic  Energy that is in motion  Both are based on the potential to do work!

What is work?  a force is said to do work if, there is a displacement of an object in a direction

Potential energy  If released, work would occur  Examples: oil in a barrel, water in a mountain lake

Kinetic energy  Must be moving!!!  Examples: electrical, heat, light, motion, water, and sound.

Kinetic energy examples explained  Mechanical Energy is the energy of motion that does the work.  An example of mechanical energy is the wind as it turns a windmill.

Kinetic energy examples explained  Heat energy is energy that is pushed into motion by using heat.  An example is a fire in your fireplace.

Kinetic energy examples explained  Chemical Energy is energy caused by chemical reactions.  An example of chemical energy is food when it is cooked.

Kinetic energy examples explained  Electrical Energy is when electricity creates motion, light or heat.  An example of electrical energy is the electric coils on your stove.

Kinetic energy examples explained  Gravitational Energy is motion that is caused by gravity.  An example of gravitational energy is water flowing down a waterfall.

Pop Quiz  Take out a sheet of paper  Put your name on it  Label 1-5  You may use your notes

Question 1  What are the two main forms of energy?

Question 2  Can energy be created or destroyed?

Question 3  When you push a bolder you are doing what?

Question 4  You ride your bike down a hill. Is this kinetic or potential energy?

Question 5  What type of energy is this?

Fossil Fuels

Standard: SEV4a: Differentiate between renewable and nonrenewable resources  Target questions: 1. What are fossil fuels? 2. How do we use fossil fuels? 3. How are fossil fuels a nonrenewable energy source?

What are Fossil Fuels?  Remains of ancient organisms that have changed into coal, oil, or natural gas

Are fossil fuels formed?  Step 1: Plants and animals die  Step 2: Their remains become buried in sediment  Step 3: Their remains decay and become compressed by the earth’s geological forces  Step 4: Fossil fuel forms 

How are fossil fuels used? Five main purposes: Heating and cooling buildings Cooking Transportation Generating electricity Manufacturing

Why are fossil fuels a problem?  Fossil fuel supply is limited  Fossil fuels cause environmental harm by releasing CO2 into the atmosphere  Please note:  Energy sources that cause environmental harm, are non-replaceable after use, and come from organic materials (like fossil fuels) are called nonrenewable energy

Where is most of our energy going?  Most of the energy produced is for electricity.  Electricity is made by an electric generator.  Electric generators convert mechanical energy into electric energy.

How does a generator work?  Water is heated by burning coal  Then the steam is pushed through the generator  The generator has a turbine (wheel) inside that changes the steam into electricity 