Primary Science and Technology Teachers' Guide - OECS

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Primary Science & Technology Teacher Manual – Resources – K – 4 CONTENT SUMMARY Classifying Natural Resources ‣ Natural resources are substances found on the earth that are used by people. ‣ The Earth’s resources are classified as renewable or nonrenewable. ‣ Renewable resources are replaced in nature and will not run out. Examples of renewable resources are water, sun, wind, plants. ‣ Nonrenewable resources cannot be replaced in a person’s lifetime; they will some day run out. Examples of nonrenewable resources are: natural gas, coal, and petroleum. ‣ We can even have shortages of renewable resources if we do not use them wisely Soil ‣ Soil is formed as a result of physical or chemical weathering of rocks. Rocks may be broken down physically by wind, rain and organisms or chemically by acid rain and oxygen in the air. ‣ There are three main types of soil. They are: clay, sand and loam. Clay soils have very small particles, the space between the particles are small and this traps water; these soils are usually waterlogged in the wet season. Sandy soils have large particles with large air spaces which allow water to drain through quickly making the soil dry. Loamy soil is excellent for plant growth because it has medium-sized particles with medium-sized air spaces that keep the right amount of water in the soil. 58
Primary Science & Technology Teacher Manual – Resources – K – 4 The table below shows properties associated with different soil types: Sandy Clay Loam Colour Light Medium Dark Texture Rough Smooth Medium Components Large sand Small clay Mixture of clay and particles particles sand Size of particles Large Small Medium SUGGESTED ACTIVITIES Classifying Natural Resources Activity 1: How are our basic Natural Resources used? Allow students to examine picture books or magazines to find out the names of different resources. Allow students to survey their school grounds (or use as a homework activity) and see how many ways we use air, water, and land. Allow students to discuss freely. They can represent their findings in the form of a chart. They should also be able to conclude that air, water, and land (rocks and soil) are three natural resources that we cannot do without. Activity 2: Renewable and non-renewable resources Students review the water cycle and discuss how water replaces itself in nature. Students identify other resources such as the sun, and the air, that will not run out. Students discuss how people use petroleum and where petroleum comes from. Students consider what would happen if we used up all the available petroleum. Would the petroleum be replaced quickly? 59
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Primary Science and Technology Teachers' Guide - OECS

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