Study the pictures of the alternative energy sources A, B and C below and answer the questions that follow - NSC Agricultural Technology - Question 3 - 2022 - Paper 1
Question 3
Study the pictures of the alternative energy sources A, B and C below and answer the questions that follow.
A
B
C
3.1.1 Choose the energy source that makes us... show full transcript
Worked Solution & Example Answer:Study the pictures of the alternative energy sources A, B and C below and answer the questions that follow - NSC Agricultural Technology - Question 3 - 2022 - Paper 1
Step 1
Choose the energy source that makes use of a generator.
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Answer
The energy source that makes use of a generator is Source C, which represents geothermal energy.
Step 2
Describe the working principles of energy source B.
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Answer
Energy source B operates through a geyser system where cold water passes through glass tubes heated by solar energy. This heated water enters the geyser through a copper pipe network, heating the cold water inside the geyser. Finally, the hot water flows back down through the solar tubes, to be reheated.
Step 3
Identify the device that must be connected to energy source A to change direct current to alternating current.
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The device necessary to change direct current to alternating current for energy source A is an inverter.
Step 4
Identify energy source C.
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Energy source C is identified as concentrated solar energy or solar panels.
Step 5
State TWO disadvantages of wind turbine blades turning too fast.
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The blades could be damaged due to excessive strain. 2. The structure may collapse under too much strain.
Step 6
Identify THREE geographical challenges that may arise during a survey for a geothermal energy power station.
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Is the rock soft enough to drill through? 2. Will this heat be sustainable for a significant amount of time? 3. Accessibility/Difficulty to locate.
Step 7
Name an alternative racing fuel that could supplement petroleum.
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Answer
An alternative racing fuel that can supplement petroleum is Methanol.
Step 8
Identify THREE substances that could be used to manufacture the alternative racing fuel named in QUESTION 3.4.1.
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Woody plant fiber. 2. Methane gas in landfills. 3. Natural gas.
Step 9
State THREE disadvantages associated with hydroelectric power plants.
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Limited plant locations. 2. High initial costs. 3. Flood risk.
Step 10
Give TWO reasons why hydroelectric power plants are limited in South Africa.
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