Which of the following rock types involves dissolved gas in the magma?
a) granite
b) pumice
c) gabbro
d) diorite
e) andesite
Answer: b) pumice
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Why has Sri Lanka decided to link a social development program to its mangrove conservation initiative?
What will be an ideal response?
Which of the following is NOT true about heat stress?
A) Heat stress can results in cramps, exhaustion, and even heat stroke. B) The National Weather Service reports a heat index to cause the human body's probable reaction to the combined effects of temperature and relative humidity. C) Heat stress can lead to potentially life-threatening conditions. D) Heat stress poses little threat to human health.
Outgassing refers to
A) a steady-state equilibrium in the water system caused by cycles of evaporation and condensation. B) process in which water and water vapor emerge from deep layers within and below Earth's crust. C) the dynamic equilibrium between surface and ocean water. D) changes in the total amount of water on Earth through evapotranspiration.
Which of the following is NOT true of plant succession?
A) Plants in a community are supplanted by more dominant, longer-term species. B) The length of time for succession to reach a climax varies, depending on the growth rates and lifespans of plants, and on rates and establishment of seed introduction. C) The length of time for succession to reach a climax varies, depending on whether soil development proceeds along with plant growth. D) all plant communities follow the same rate of succession.