Despite the various attempts of land and ocean drilling, there has been no success in reaching the
interior of the Earth. Indicate whether the statement is true or false.
ANS: T
There have been attempts made to reach the interior of the Earth, but they have been unsuccessful. The
deepest drilling attempt went down to 12.262 kilometers on the Kola Peninsula in Russia before high
temperatures and pressure squeezed the hole closed. Information can be found in the section Earth's
Interior Is Layered.
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The shape of Earth's magnetic field resembles
A) a bar magnet. B) a horseshoe magnet. C) an elliptical magnet. D) a spherical magnet.
The air you breathe into your lungs on a daily basis mostly consists of
A) oxygen. B) carbon dioxide. C) nitrogen. D) hydrogen.
In coral reefs, clownfish live unharmed among the poisonous tentacles of sea anemones. The sea anemones protect the clownfish from predation, while the clownfish scare off predators, such butterfly fish, which would otherwise eat the anemones
The clownfish may also provide important nutrients to the anemones. This is an example of which symbiotic relationship? A) parasitism B) mutualism C) commensalism D) amensalism
Shield areas in continental interiors are characterized by ________
A) flat river valleys that cut through older mountain ranges B) linear chains of mountains less than 100 million years old C) flat areas that include rocks older than 1 billion years old D) ancient coastal regions that have become abandoned and eroded