The concave lower portion of a typical slope is called a
A) waning slope.
B) pediment.
C) debris slope.
D) free face.
A
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Which of the following gases are mainly responsible for the atmospheric greenhouse effect in the Earth's atmosphere?
A. water vapour and carbon dioxide B. ozone and oxygen C. nitrogen and carbon dioxide D. oxygen and nitrogen
Consider an early reef-builder of the Cambrian, the archaeocyathid. Using correct terminology for marine ecosystems,
classify this organism on where it lives, how it gets around, and how it feeds. How does the lifestyle of archeocyathids compare with that of Cambrian trilobites? What will be an ideal response?
Figure 11.8
What is drift-net fishing? Which letter depicts drift-net fishing on the accompanying figure?
What will be an ideal response?
Gold is found in ________.
A. placer deposits B. gossan C. pegmatites D. weathered granites E. limestones