What is a sinkhole? How does it form? How do sinkholes relate to caves?
What will be an ideal response?
A sinkhole is a depression on the Earth's surface caused by the collapse of surface rock and regolith into a large underground cavity. It forms when ground water dissolves the rock, and the unstable roof collapses. It is most common in limestone and evaporites.
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Of what value are the oceans in moderating climate change?
a. Oceans remove about 25% to 30% of the atmospheric carbon dioxide produced by humans. b. Oceans reflect sunlight back into space before the ultraviolet wavelengths are converted into infrared radiation. c. Oceans absorb about 40% of the methane out of the atmosphere that has been produced by rice paddies and livestock. d. Oceans help to reduce the level of water vapor in the atmosphere through condensation and transpiration. e. All of these answers.
Conodonts are small marine fossils composed of the mineral apatite. Indicate whether the statement is true or false
When a flood crest passes downstream, stream level falls more rapidly than it rose.
Answer the following statement true (T) or false (F)
The term "greenhouse effect" refers to an increase in atmospheric temperatures resulting from an increasing blanket of clouds around the earth.
Answer the following statement true (T) or false (F)