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Pretest: Life in the Oceans
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Select the correct answer from each drop-down menu.
Choose the correct word to complete the sentences to identify the correct kingdom classification.
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Before the discovery of microscopes, all forms of life on Earth were divided into two kingdoms,
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answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.

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