LESSON 9.2 What type of resource is water?
LEARNING INTENTION By the end of this lesson, you should be able to: • classify resources as renewable, non-renewable or continuous • describe how water changes its form and location within the environment.
Tune in Did you know that some materials sourced by humans from Earth are able to be replenished in our lifetime?
FIGURE1 People use different kinds of resources.
1. Which of the resources in FIGURE 1 do you think can be replaced in our lifetime? 2. Discuss which of the resources has an unlimited supply. What factors may control the supply of this resource? 3. Which of these resources causes harm to nature if not handled properly?
9.2.1 Why do we need resources? We need resources from Earth to live, such as water to drink, soil for food, and forests and mines for materials. Environmental resources are natural materials useful to people. The global distribution of environmental resources depends on the Earth’s rocks and climate. Some minerals, like uranium , are rare and mostly found in Australia. Countries in the Middle East, like Saudi Arabia and Iran, have lots of oil but not much water. Some African countries, like Botswana, have minerals but not enough money to mine them. Human activities like farming, fishing, logging and mining all rely on natural resources. 9.2.2 How do we classify resources? Environmental resources either have a limited supply or are constantly replenished naturally. FIGURE2 shows that how we use and manage these resources helps classify them. Using resources wisely ensures non-renewable ones are recycled and renewable ones are not used up too quickly.
246 Jacaranda Humanities Alive 7 Victorian Curriculum Third Edition
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