Content Outline for Teaching - Potosi School District - Home

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22 Section 1 Content Outline for Teaching Natural Resource Use Earth’s Resources Underlined words and phrases are to be filled in by students on the Note-taking Worksheet. A. Most of the things you buy or use are made of materials that come from natural resources. 1. Natural resources are things found in nature that living things use. 2. Organisms use natural resources to meet their needs. 3. Natl resources include a. nutrients,which come from vegetables, b. trees,which provide lumber, and c. minerals,which can be used to make plastic and metal. B. Natural resources are used to make items,such as a CD player. 1. The cardboard box the CD player comes in is made from trees. 2. Plastic is made from crude oil,athick, dark liquid found underground. 3. The metal screws are made from iron ore,which is also found underground. 4. It takes energy to get natural resources and make them into the parts of a CD player. a. Energy also comes from natural resources. b. Trucks use gasoline or diesel fuel to take natural resources to factories. c. The electricity used to power the machines that make the CD player comes from coal. C. Resources that can be replaced in 100 years or less are called renewable resources. 1. Energy from the Sun is a renewable resource because it gives off light energy every day and will continue to do so for millions of years. 2. Trees are a renewable resource because most trees will grow back and be cut again in less than 100 years. 3. Water is a renewable resource because the same water has been reused over and over again on Earth. 4. Wind is a renewable resource because it can be used again and again to make electricity with the help of a wind mill. Earth’s Resources 72
22 Content Outline for Teaching Earth’s Resources (continued) D. Nonrenewable resources are resources that cannot be replaced by natural processes within 100 years. 1. Nonrenewable resources include a. coal, b. crude oil,and c. natural gas. 2. Nonrenewable resources form slowly over long periods of time. 3. When we use up nonrenewable resources, it can take millions of years for new ones to form. 4. Conservation is the practice of protecting and preserving natural resources so they will always be available. Discussion Question Can the pollution created by nonrenewable resources be reduced? Yes. Alternative natural resources such as sunlight and wind can provide the energy we need reducing atmospheric and water pollution. Earth’s Resources 73
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