What are sunspots? How can sunspots affect the climate on Earth?
What will be an ideal response?
Answer: Sunspots appear as dark blemishes on the Sun and consist of large magnetic storms extending deep into the Sun's interior, which eject mass outward. During periods of maximum sunspot activity, the Sun emits more energy than during the minimum periods. Scientists hypothesize that minimums in sunspot activity may correspond to the Little Ice Age, when average temperatures were cooler.
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How can earthquakes cripple emergency services, transportation networks, water and gas utilities, and communication?
What will be an ideal response?
What are the three farming patterns that are found in Southeast Asia, and generally where are each of these patterns found?
What will be an ideal response?
Requirements for a hurricane to develop include all but which of the following?
A. seawater with a temperature of at least 27°C in the upper 60 m of the ocean B. The storm must be at least 200 km from the equator. C. weak upper-level winds, preferably blowing in the same direction the developing storm is moving D. Air must be unstable, warm, and humid.
Zinc, Zn, is more easily oxidized than copper, Cu. Two strips of these metals are placed within separate salt solutions and then connected by a wire. Does an electric current pass through this wire?
A. No, an electric current does not pass through the wire because this would result in a prohibitive buildup of charge. B. Yes, as the zinc is oxidized in the salt solution, its released electrons pass through the wire producing an electric current. C. Yes and No. The passage of an electric current depends on whether the salt solutions are sufficiently concentrated to cause the oxidation of the zinc metal. The answer is yes only if the salt solution concentration is greater than 1M. D. There is insufficient information given to know. The passage of electric current depends on three things: the size of the plates, the concentration of the salt solution, and the gauge of the wire.