Subduction on Earth Is the Process by Which

question 109

Multiple Choice

Subduction on Earth is the process by which

• A) cool surface material on Earth sinks below other material at a tectonic plate boundary.
• B) dense material sank while lighter material rose to the surface during the early geological history of Earth.
• C) molten lava oozes out between two tectonic plates that are spreading apart.
• D) volcanic material emerges from the deep interior at a volcanic island such as Hawaii.

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Definitions:

Oxygen Levels

The amount of oxygen present in a given environment or substance, often measured to assess air or water quality.

Inorganic Nutrients

Nutrients that do not contain carbon-hydrogen bonds, essential for plant growth, such as nitrogen, phosphorus, and potassium.

Nitrates

Inorganic compounds made of nitrogen and oxygen that are found naturally in the environment but can cause health and environmental issues at high concentrations.

Phosphates

Inorganic chemical compounds used as fertilizers and in various industrial applications, often contributing to water pollution.