Collecting adequate samples from which of the following is the most difficult?
A) Continental shelf
B) Estuaries and lagoons
C) Marine sediments on land
D) The deep-ocean floor
D
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Which of the following is the main source of energy for a hurricane?
A. upper-level jet stream B. warm ocean water and the release of latent heat of condensation C. ocean currents and tides D. warm air rising and cold air sinking in the vicinity of weather fronts
Ridges, rifts, and rises are common features along divergent plate boundaries Indicate whether the statement is true or false
The two types of crust are ____________________ and ____________________. Fill in the blank(s) with the appropriate word(s)
About 541 million years ago, life on Earth began a 40-million-year-long burst of remarkable evolutionary change.
Answer the following statement true (T) or false (F)