Both Love and Rayleigh waves are referred to as L waves (long waves) because they take longer periods of time to complete one cycle of motion and are slower moving relative to P and S waves.
Answer the following statement true (T) or false (F)
True
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Where have the oldest dated sand grains been found on Earth?
A) Australia B) Canada C) The United States D) Africa
What do scientists mean when they say that a flood is a 100-year flood?
A)A flood of that magnitude will occur once every 100 years. B)Every year there is a 1% chance of a flood of a certain magnitude occurring. C)There isn't enough information to determine how frequently flooding occurs. D)Every year, there is a 10% chance of a flood of a certain magnitude occurring. E)The last time a flood of that size occurred was 100 years ago.
Which type of agriculture is found primarily in less developed countries?
A) Mediterranean B) plantation C) truck farming D) commercial gardening E) None of these is found in LDCs; they are all commercial agriculture.
On the western edges of the European continent arise short rugged mountains called highlands that extend throughout Norway, parts of Britain, and portions of the Iberian Peninsula of Portugal and Spain.
a. true b. false