Data loggers are gradually replacing ____
a. radiosondes
b. mechanical thermographs
c. electrical thermometers
d. mercury thermometers
e. wind-chill measurement devices
ANSWER: b
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Which marine reptiles make long migrations to lay eggs on the very same beach they hatched from?
a. Sea turtles b. Crocodiles c. Lizards d. Sea snakes e. Iguanas
Two species of frogs do not interbreed because one species breeds in March and the other species breeds in May. This is an example of
A. allopatric speciation. B. a postzygotic reproductive barrier. C. a prezygotic reproductive barrier. D. sympatric speciation.
When did the Dust Bowl occur and why?
A. 1890s; wind B. 1930s; wind C. 1930s; water D. 1890s; water
If the salinity of ocean water is 36‰, there are ________ g of salt left from evaporating 2 kg of seawater.
A. 54 B. 18 C. 72 D. 36 E. 9