You are given two volcanic rock samples; one is said to have been ripped from the walls of the volcano, and the other is a cooled sample from a molten river. How can you tell which is which?
What will be an ideal response?
Answer: Both samples are composed of the same minerals. However, the fragment from the wall of the volcano is the sample with minerals readily visible to the naked eye. It is very difficult to see what composes cooled volcanic rock, so the sample with a few visible crystals surrounded by a black, nondescript background would be the cooled rock from the molten river.
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A. fertilizing the Amazon Basin. B. burning biomass such as chicken waste. C. making an excellent organic fertilizer D. keeping carbon in the soil for up to 1,000 years. E. releasing small amounts of carbon dioxide when it is made.
Monsoon refers to:
A) heavy tropical precipitation. B) the climatic pattern in which heavy precipitation alternates with hot, dry conditions on an annual basis. C) heavy summer rains in South Asia. D) none of the above
Which naturally emitted gas, accumulating in indoor spaces, has been linked with lung cancer in humans?
A) radon B) ozone C) carbon monoxide D) asbestos E) mercury
The coast of Norway is known for its steep-sided:
What will be an ideal response?