2. Explain the difference between renewable, non-renewable and continuous resources. 3. Complete the following table by listing two examples of each type of resource.
Renewable Non-renewable Continuous
4. Which renewable resources are most affected by human activity? A. Fossil fuels, coal, oil, natural gas
B. Solar energy, tides, waves, water, air C. Fish, groundwater supply, forests, soil D. Aluminium, gold, lead, silver, tin, mercury ANALYSE AND APPLY 5. Explain how the hydrologic cycle moves water across the Earth. 6. State if the following statements are true or false. Rewrite the incorrect statements to make them true. a. The sun’s energy interrupts the operation of the water cycle. b. It has been calculated that water stays in the atmosphere for an average of nine days. c. It is estimated that up to 50 per cent of the Earth’s fresh water is locked in ice sheets in the Arctic. d. Water spends between two and six months in snow and rivers. e. Precipitation is when water vapour cools and condenses to form clouds and fog. f. More liveable places are commonly situated on rivers and lakes. 7. Identify the place where water stays for the longest period of time during the operation of the water cycle. 8. Explain how ice core samples can be used to help us understand changes to the water cycle over time. 9. Refer to FIGURE3 to answer the following questions. a. List the two sources of renewable energy generated that are found in the atmosphere. b. Identify places in the world where these two power sources may be more effective. Give reasons for your answer. EVALUATE AND COMMUNICATE 10. Write a clear passage that describes to students in Years 3 and 4 how the water cycle works. Answers and sample responses for this topic are available online.
TOPIC9 Water in the world 251
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