What occurs when waves hit an obstacle straight on?
a. Wave refraction
b. Wave diffraction
c. Wave dispersion
d. Wave reflection
ANS: D
When waves hit an obstacle straight on, they reflect back towards the direction they came from. This
causes interference to the vertical oscillations. Information can be found in the section Deep-Water
Waves Change to Shallow-Water Waves As They Approach Shore
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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) sympatric speciation. C) a prezygotic reproductive barrier. D) a postzygotic reproductive barrier.
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What will be an ideal response?
When making macaroni and cheese you notice the noodles rising and falling in the boiling water. This is best explained through the process of
A. convection. B. conduction. C. advection. D. radiation.
Since 1979 hurricanes and tropical storms have been given both male and female names. How are these storms named if there are more than 21 named storms in a given year?
A. They just keep getting alternating male and female names. B. They are named after letters in the Greek Alphabet, starting with alpha. C. They are named by number, starting with 22. D. They are named after the ancient Roman gods. E. They are named after famous scientists.