Slide 1 / 73 Slide 2 / 73 4th Grade Energy and Natural Resources 2015-11-18 www.njctl.org Slide 3 / 73 Slide 4 / 73 Energy and Natural Resources Click on the topic to go to that section Human Energy Use · Human Energy Use Renewable Energy · Non-Renewable Energy · Environmental Impacts · Return to Table of Contents Slide 5 / 73 Slide 6 / 73 Energy Human Energy Use Do you remember what energy is? Click below to review. Have you noticed that we use a lot of energy and fuels in our everyday lives? Energy is the ability and potential to do things. We have already learned a lot about energy. In this unit we are going to learn even more about energy and how humans use and interact with it.
Slide 7 / 73 Slide 8 / 73 Human Energy Use Human Energy Use Can you think of more ways that humans use energy and Where do you think the energy comes from to do all these fuels that the pictures didn't show? things? Think of things that require energy that we must get from Discuss with your table and write your ideas below. somewhere else, instead of things that we do that use our own energy. (Remember, energy is the ability and potential to do things.) Slide 9 / 73 Slide 10 / 73 Sources of Energy Sources of Energy Energy that humans use usually comes from natural sources . The sun, plants, coal, petroleum, heat, water, and natural gas This means that the energy comes from things that are all examples of natural energy sources that humans use can be found in the environment, somewhere on the Earth. to do many different things. What are some natural sources of energy? Click in the box to find out. When we talk about energy, some of these energy sources go by different names. Do you know some of their names? Plants used for energy are called biofuels . petroleum plants the sun coal Water energy is called hydroelectric energy. (oil) Heat energy from Earth is called geothermal energy. Energy from the sun is called solar energy. heat water natural gas Slide 11 / 73 Slide 12 / 73 U.S. Sources of Energy What kind of energy do we use most? Which source of energy do you think humans use the most? The second most? Not very much at all? Discuss it with your group. This graphic, based on energy use in the United States in 2009, shows how Based on your current knowledge, move the following types much of the energy that of energy into a list, ranking them from the least to greatest year came from which usage in the United States. sources. What do you notice? PETROLEUM COAL SOLAR BIOFUELS Does anything surprise you? Were your predictions HYDROELECTRIC WIND GEOTHERMAL NATURAL GAS close?
Slide 13 / 73 Slide 14 / 73 Converting Energy 1 Humans produce all the energy they use in their everyday lives on their own. Humans "produce" energy from all different sources, but like we already learned about energy, when we say "produce energy" it typically really means that we convert energy from True one form to another or transfer it from one place to another. False This is because energy cannot be created; energy is conserved. Remember back to the example of solar panels. How do they work? Click below to check your answer. Solar panels turn light energy into electrical energy. Light energy is changed into electrical energy. Slide 15 / 73 Slide 16 / 73 2 All of the following are natural sources of energy 3 Do humans produce new energy? except: Yes A the sun No B petroleum C wind D the moon Slide 17 / 73 Slide 18 / 73 4 What is energy that comes from moving water called? 5 Which of the following sources of energy do humans use the largest amount of? A aqua power A biofuels B hydroelectric power B natural gas C biofuel C petroleum D water D wind power
Slide 19 / 73 Slide 20 / 73 What is Renewable Energy? What do you think when you hear the term renewable energy? Renewable Energy What do you think it is? Discuss it with your table. Return to Table of Contents Slide 21 / 73 Slide 22 / 73 Renewable Energy Renewable Energy Sources Renewable energy is energy that comes from a source that is Did you think of any of these sources of renewable energy? not in danger of being used up because it can be recreated relatively quickly . agricultural waste The source of energy can be renewed , meaning it won't run biofuels out before more is produced. biomass geothermal power hydroelectric power Can you think of some examples of renewable energy? Write methane from cows your ideas in the box. nuclear solar power tidal power wave power wind wood pictures: listverse.com Slide 23 / 73 Slide 24 / 73 Biomass Biofuels Biomass is living or recently dead biological materials that Biofuels are fuels that are made from biomass. can be used as fuel or for industrial production. Bioethanol and biodiesel are the two main types of biofuels This can be plants grown to generate electricity, animal used today. Bioethanol is made from plants. Biodiesel is matter used for production of goods, or biodegradable wastes made from vegetable oils, animal fats, or recycled greases. that can be burned as fuel. ethanol plant biodiesel from soybeans
Slide 25 / 73 Slide 26 / 73 Geothermal Power Hydroelectric Power Geothermal power involves extracting heat from the earth to Hydroelectricity is the production of power through use of the produce energy, usually for heating or electricity. gravitational force of falling or flowing water. Geothermal power can be used on a small scale, such as This usually involves either a dam or a water wheel. heating an apartment complex. It can also be used on a larger scale for energy production through a geothermal power plant. geothermal pump a geothermal power plant Slide 27 / 73 Slide 28 / 73 Nuclear Power Solar Power Nuclear power extracts useable energy from atomic nuclei Solar power is harnessing the sun's energy to produce through controlled nuclear reactions. electricity. Nuclear reactors heat water to produce steam, which is then Photovoltaic cells, also called solar panels, are used to converted into mechanical work for the purpose of generating capture this energy. electricity or propulsion. Slide 29 / 73 Slide 30 / 73 Wind Renewable Energy Wind power is the conversion of wind energy into a useable Think about these different sources of energy. form by wind turbines. How are they able to be renewed? Why do they not run out? Wind power is typically converted into electricity or mechanical energy. Discuss with your table.
Slide 31 / 73 Slide 32 / 73 6 A renewable energy source is defined as an energy 7 Renewable energy sources: source that has little impact on the environment. A have only existed for about 100 years True B cannot be replaced once they're used up False C are always man-made D do not run out Slide 33 / 73 Slide 34 / 73 8 Can renewable energy only be used on a small scale? 9 Energy produced using heat from the Earth is called ___. Yes A hydroelectric power No B geothermal power C solar power D biomass Slide 35 / 73 Slide 36 / 73 Renewable Energy Use 10 This is a: This is a graphic showing World Energy Consumption by Source (in 2010). A nuclear reactor How much of the energy that we use is renewable? What types of renewable energy are used the most? B geothermal power plant C photovoltaic cell D biodiesel plant
Slide 37 / 73 Slide 38 / 73 11 Renewable energy makes up about what amount of 12 Based on data from 2010, what type of renewable the word's total energy consumption? energy is used more than any other type? A a little less than half A biomass B 5% B solar C 1/5 C wind D 1/4 D hydroelectric Slide 39 / 73 Slide 40 / 73 What is Non-Renewable Energy? If renewable energy is energy that comes from a source that is not in danger of being used up because it can be recreated Non-Renewable Energy relatively quickly, then what do you think non-renewable energy is? Return to Table of Contents Slide 41 / 73 Slide 42 / 73 Non-Renewable Energy Non-Renewable Energy Non-renewable energy sources are referred to as Non-renewable energy come from sources that will run out or fossil fuels. These include: will not be replenished in our lifetimes - or in many many lifetimes. coal petroleum / crude oil Non-renewable energy sources cannot be renewed, meaning natural gas they will run out before more is produced. Other non-renewable sources are: Can you think of some examples of non-renewable energy? Write your ideas in the box. uranium (used in nuclear power*) *Nuclear energy itself is renewable; however uranium - the material used in nuclear power plants - is not. Therefore nuclear power can be considered both renewable and non- renewable.
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