Multiple Choice
Which of the following best describes the net primary productivity (NPP) of an ecosystem?
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48. Ecology
Introduction to Ecology
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Which of the following sequences correctly describes how magma can eventually become soil?
A
Magma directly transforms into soil through biological activity.
B
Magma is compressed into sedimentary rock, which then becomes soil.
C
Magma cools to form igneous rock, which weathers into sediment, and then soil forms from the sediment.
D
Magma evaporates, leaving behind minerals that become soil.
Verified step by step guidance1
Understand the nature of magma: Magma is molten rock beneath the Earth's surface. It cannot directly transform into soil or evaporate, as these processes are not consistent with geological principles.
Recognize the cooling process: Magma cools and solidifies to form igneous rock. This is a fundamental step in the rock cycle.
Identify weathering: Igneous rock undergoes weathering, which is the breakdown of rock into smaller particles (sediment) through physical, chemical, or biological processes.
Understand sediment formation: The weathered particles (sediment) accumulate and can eventually contribute to soil formation through further biological activity and chemical processes.
Conclude the sequence: The correct sequence is that magma cools to form igneous rock, which weathers into sediment, and then soil forms from the sediment.
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