Primary Science and Technology Teachers' Guide - OECS
Primary Science and Technology Teachers' Guide - OECS
Primary Science and Technology Teachers' Guide - OECS
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<strong>Primary</strong> <strong>Science</strong> & <strong>Technology</strong> Teacher Manual – Resources – K – 4<br />
CONTENT SUMMARY<br />
Classifying Natural Resources<br />
‣ Natural resources are substances found on the earth that are used<br />
by people.<br />
‣ The Earth’s resources are classified as renewable or<br />
nonrenewable.<br />
‣ Renewable resources are replaced in nature <strong>and</strong> will not run out.<br />
Examples of renewable resources are water, sun, wind, plants.<br />
‣ Nonrenewable resources cannot be replaced in a person’s lifetime;<br />
they will some day run out. Examples of nonrenewable resources<br />
are: natural gas, coal, <strong>and</strong> petroleum.<br />
‣ We can even have shortages of renewable resources if we do not<br />
use them wisely<br />
Soil<br />
‣ Soil is formed as a result of physical or chemical weathering of rocks.<br />
Rocks may be broken down physically by wind, rain <strong>and</strong> organisms or<br />
chemically by acid rain <strong>and</strong> oxygen in the air.<br />
‣ There are three main types of soil. They are: clay, s<strong>and</strong> <strong>and</strong> loam.<br />
Clay soils have very small particles, the space between the particles<br />
are small <strong>and</strong> this traps water; these soils are usually waterlogged in<br />
the wet season. S<strong>and</strong>y soils have large particles with large air spaces<br />
which allow water to drain through quickly making the soil dry.<br />
Loamy soil is excellent for plant growth because it has medium-sized<br />
particles with medium-sized air spaces that keep the right amount of<br />
water in the soil.<br />
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