Question 1
Dangerous "sleeper waves" result from
◦ earthquakes.
◦ volcanic eruptions.
◦ submarine landslides.
◦ constructive, in-phase interference.
Question 2
Desert landscapes tend to be ________ in appearance because of the ________.
◦ rugged and hard-edged; lack of water erosion
◦ rugged and hard edged; type of resistant rock found in deserts
◦ rounded and smooth; abrasion
◦ rounded and smooth; type of nonresistant rock found in deserts