ENERGY RESOURCES

1
ENERGY RESOURCES

• Reassessment Review

2
Review Directions

• Go through the PowerPoint by choosing slideshow
  and From Beginning
• As you go through take notes. You must include
  the following for each resource
• What is it
• How it works
• Advantages
• Disadvantages
• Feel free to take notes in any way you feel is
  best using separate note cards, creating a
  chart, a bulleted list, etc.
• Memorize the information.

3
Key Words

• Energy being able to do work. Example - food
  gives us energy, so that we can move
• Fuel - Fuel is anything that is
• burned or altered to obtain energy

Fuel gauge
4
Solar power

• Most of the Earth's energy comes from the sun
• What is it?
• Solar power is energy from the sun
• How it works.
• There are two main ways that we use the Sun's
  energy
• 1. Solar Cells / Panels collect sun light and
  convert it into electricity.
• 2. Solar water heating which is when the sun
  directly heats water.

5
Why Use Solar power?

• Advantages
• Solar energy is free - no fuel, no waste or
  pollution.
• In sunny countries, easy to use in remote places
  with no electricity
• It is renewable we wont run out
• Disadvantages
• Cant collect at night or on cloudy days.
• Very expensive to build solar power stations.

6
ENERGY FROM FOSSIL FUELSFossil fuels are coal
oil and natural gas

• coal oil
  natural gas
• What are they?
• Fossil fuels were formed from dead plants and
  animals over millions of years. They were
  quickly buried by sediments in swamps. Over
  millions of years the pressure heat turned them
  into coal oil and natural gas.
• Coal comes from dead trees and oil and gas from
  dead plants animals. When we burn fossil fuels,
  were actually using the SUNS energy that has
  been stored as chemical energy underground for
  millions of years!!!

fossils
7
ENERGY FROM FOSSIL FUELS

• How they work.
• Fossil fuels are mined or pumped from deep in the
  earth.
• They are burned to heat water and make steam.
• The moving steam spins a generator and generate
  electricity.

8
Why use fossil fuels to make electricity?

• Advantages
• Electricity can be generated fairly cheaply.
• Transporting oil and gas to the power stations is
  easy.
• Gas-fired power stations are very efficient.
• A fossil-fuelled power station can be built
  almost anywhere.
•  
• Disadvantages
• Pollution. Burning any fossil fuel produces
  carbon dioxide, which pollutes the
  air.
• Mining coal can be difficult, dangerous and ugly.
• Fossil fuels are a non- renewable energy
  resource. Once we've burned them all, there
  isn't any more and our use of fossil fuels has
  nearly doubled every 20 years since 1900. This
  is a particular problem for oil, because we also
  use it to make plastics and many other products.

9
Wind power

• What is it?
• Wind comes from the earth spinning and from warm
  air rising and other air moving in to replace it.
  
• How it works.
• The moving wind blows the propeller round,
  which turns a
  generator to produce electricity
  
• We tend to build many of these towers together,
  to make a "wind farm" and
  produce more electricity.
• The more towers, the more wind, and the larger
  the propellers, the more electricity we can make!

10
Why use wind power?

• Advantages
• Wind is free.
• Produces no waste or greenhouse gases.
• The land beneath can usually still be used for
  farming.
• Wind farms can be tourist attractions.
• A good method of supplying energy to remote
  areas
• Wind power is renewable. Winds will keep on
  blowing.
• Disadvantages
• The wind is not always predictable - some days
  have no wind.
• Suitable areas for wind farms are often near the
  coast, where land is expensive.
• Some people feel that covering the landscape with
  these towers is ugly
• Can kill birds.
• Can affect television reception if you live
  nearby.
• Can be noisy.

11
Hydro-electric power

• What is it?
• Hydro-electric power is energy generated from
  falling water. Nowadays there are many
  hydro-electric power stations, providing around
  20 of the world's electricity.
• How it works.
• A dam is built to trap water, usually in a river
  valley.
• Water is allowed to flow through tunnels in the
  dam, to turn turbines
• and thus drive generators to produce electricity.
  

(http//www.wvic.com/hydro-works.htm) 
12
Advantages - Why use Hydro-electric power?
13
Disadvantages
14
NUCLEAR POWER

• What is it?
• Nuclear power is energy created from splitting
  atoms. It is generated using Uranium, which is a
  metal mined in various parts of the world.
• Nuclear power produces around 11 of the world's
  energy needs, and produces huge amounts of energy
  from small amounts of fuel, without pollution.

15
Advantages of using nuclear power
16
disadvantages
17
GEOTHERMAL ENERGY

• What is it?
• Heat from inside the earth.
• How it works
• Hot rocks underground heat water to produce
  steam. We drill holes down to the hot region
  steam comes up, is purified and used to drive
  turbines, which drive generators to make
  electricity.
• Geothermal energy is an important
  resource in volcanically
  active
  places such as Iceland and New
  Zealand.

http//keller.clarke.edu
18
Advantages
19
disadvantages
20
BIOMASS - ENERGY FROM ORGANIC MATERIALS

• What is it?
• Biomass is energy from burning organic materials
  like wood, trash and manure (poop!).
• How it works
• Sugar cane can be used to make alcohol, which can
  be burned to generate power
• Other solid wastes, can be burned to provide
  heat, or used to make steam for a power station
• We can use rubbish, animal manure, woodchips,
  seaweed, corn stalks and other waste

21

• Advantages
• It makes sense to use waste materials where we
  can.
• The fuel tends to be cheap.
• Less demand on the Earth's resources.
• Biomass is renewable, as we're going to carry on
  making waste products. We can always plant and
  grow more sugar cane and more trees, so those are
  renewable too.
• Disadvantages
• Collecting the waste in sufficient quantities can
  be difficult.
• We burn the fuel, so it makes pollution.
• Some waste materials are not available all year
  round.