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Questions and Answers
Which process is responsible for the formation of placer deposits of gold, tin ore, and gems such as diamonds or sapphires?
Which process is responsible for the formation of placer deposits of gold, tin ore, and gems such as diamonds or sapphires?
- Deposition of sediments
- Weathering of rocks
- Evaporation of water
- Transportation by rivers (correct)
What can be mined from deposits of pure sand created by rivers?
What can be mined from deposits of pure sand created by rivers?
- Quartz veins
- Salt and other chemicals
- Building materials
- Silicon for computer chips (correct)
What happens to the dissolved chemicals carried by rivers and streams in arid regions?
What happens to the dissolved chemicals carried by rivers and streams in arid regions?
- They are evaporated by the Sun (correct)
- They are used for building materials
- They are weathered by rocks
- They are transported to lakes with outlets
What type of deposits were the early Australian gold discoveries around Bathurst?
What type of deposits were the early Australian gold discoveries around Bathurst?
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What happens when the speed of a river decreases?
What happens when the speed of a river decreases?
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