Coral reefs are formed by ________.
A. coral polyps and calcareous algae, shells and worm tubes, and volcanic action and subsidence
B. shells and worm tubes
C. volcanic action and subsidence
D. coral polyps and calcareous algae
E. coral polyps and calcareous algae as well as shells and worm tubes
Answer: E
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What is a financial tool to help people climb out of poverty?
A. Student loans B. Microlending C. Microtaxes D. Education grants E. No ATM fees
Limestone is prone to chemical weathering because it consists of a mineral from the ________ group
Fill in the blank(s) with correct word
Which climate supports large herds of grazing animals?
a. humid subtropical b. desert c. tropical monsoon d. tropical rainforest e. steppe
The Earth's atmosphere is composed mostly of ________
A) water and carbon dioxide B) nitrogen and oxygen C) oxygen and carbon dioxide D) nitrogen and carbon dioxide E) water and oxygen