(1) Scientists can test whether it is right or wrong to cut down trees for farmland. (T)
(2). True science builds knowledge by following a specific method to collect data. (T)
(3). The natural cycles of Earth continue and are unaffected by human impact. (F)
(4) Mining underground causes less environmental damage than surface mining. (T)
(5) All physical environments on Earth have the same characteristics. (F)
(6) Waste in landfills can be reused for other purposes. (T)
The given statements and corresponding explanations:
(1) Scientists can test whether it is right or wrong to cut down trees for farmland.
True (T), scientists can collect data samples from the farmland where trees are being cut down and also from the farmland where trees are not cut. The scientist can perform a lab test to determine the fertility of various farmland and hence concludes whether it is right or wrong to cut down trees for farmland.
(2). True science builds knowledge by following a specific method to collect data.
This statement is true (T), every scientific theory or knowledge is based on step by step method of data collection and testing.
(3). The natural cycles of Earth continue and are unaffected by human impact.
This statement is false (F). The humans activities such as mining and bush burning causes carbon (iv) oxide gas emission. This gas and other green house gases from human activities causes climate change.
(4). Mining underground causes less environmental damage than surface mining.
This statement is True (T). Surface mining involves a complete removal of top rock surface while underground mining involves creating a shaft or tunnel to tap the minerals. Although the underground mining is more expensive and exposes the laborers to more dangerous situations when mines collapse but the surface mining causes severe soil erosion and contamination of the environments.
(5) All physical environments on Earth have the same characteristics.
This statement is False (F): The Earth's physical environments include the oceans, deserts, tundra and tropical rainforests. These physical environments have different characteristics, some are extremely hot while some are extremely cold. Some also experience more rain than others.
(6) Waste in landfills can be reused for other purposes.
This statement is true (T): The bio-degradable types can be used as farm manure.
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