Milankovitch cycles
A) explain little of the Pleistocene climate variation.
B) explain ancient climate change better than more recent climate change.
C) have not yet been tested due to inadequate amounts of data.
D) have difficulty in accounting for effects caused by changes in Earth's eccentricity.
Answer: D
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What factors might explain why European conquest and settlement occurred much earlier in tropical America than in tropical Africa?
What will be an ideal response?
______ is a feature of a divergent plate boundary. CHOOSE ALL THAT APPLY.
a. A continental volcanic arc b. A subduction zone c. A rift valley d. A deep-ocean trench e. An oceanic ridge
Tropical oceans are generally characterized by low net primary productivity. What are three environments that are exceptions to this and what factors contribute to their higher productivity?
What will be an ideal response?
An old, failed rift under the central United States is believed to represent a zone of weakness in the lithosphere and a possible earthquake hazard zone.
Answer the following statement true (T) or false (F)