Ch. 2: “Renewable and Nonrenewable Resources ”. Lesson 2.2: “Availability of Resources”. Availability of Resources :.
Lesson 2.2: “Availability of Resources”
Nearly every resource from foodto fuelsneeds to be removed from the Earth and processedin some way before it can be made available to the consumer. Some extractionand processingmethods are relatively simple and involve little or no equipmentand energy. Other resource removal and processing methods are complexand involve sophisticated machineryrun by computers. The availability of our natural resources is related to the costsof extractingand processingthem.
2. Briefly describe what each of the following modern tools is used for.
a. cultivators: have hoe-like parts that look like claws & turn the soil between rows
b. disks: have sharp, round blades that turn the soil in the spring
c. windrowers: cut swaths of grasses or forage crops into neat rows to dry in the sun
d. combines: cuts the crop & removes the seed from its protective layers/the combine’s header cuts the grain, which is then delivered to the threshing machine
e. chain saws: used for felling trees or remove unwanted limbs
f. circular saws: same as chainsaw
a. severe weather: flood, drought, extreme cold, etc.
b. biological infestations: pathogens
c. natural oil seeps: oil enters water through cracks in the Earth’s crust
d. fire: wildfires, volcanic eruptions