Which of the following terms refers to the percentage of water vapour present in the air compared to that required for saturation?
A. relative humidity
B. mixing ratio
C. absolute humidity
D. dew point
Answer: A
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What is a negatively charged particle that travels in the space around the nucleus of an atom?
A. Electron B. Isotope C. Neutron D. Proton
What is the type of rock formed when magma or lava cools?
A) geothermal B) igneous C) metamorphic D) sedimentary E) lithospheric
Maritime tropical air masses influence the marine west coast climates
Indicate whether the statement is true or false
Which of the following accurately describes 18O/16O ratios of the oceans?
A) During the winter, 16O is high in the ocean; during warmer periods the isotope ratio is lower. B) The 18O/16O ratio in the ocean is low during the winter because temperatures are too low for 16O to evaporate. C) The ratio of oceanic 18O/16O in the late summer is high, because the most of the 16O has evaporated by then. D) Because 18O evaporates more readily than 16O, the oceans have a higher relative abundance of 16O during the summer.