Why Are Silicate Rocks the Most Common on Earth

question 33

Multiple Choice

Why are silicate rocks the most common on Earth?

• A) The most common minerals are silicates.
• B) Iron, oxygen, silicon and magnesium make up 91.2% of the Earth's mass.
• C) Oxygen, silicon, iron, and hydrogen make up 91.2% of the Earth's mass.
• D) Both a and b are correct.
• E) Both a and c are correct.

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Definitions:

Marginal Physical Product

The additional output resulting from using one more unit of a physical input, holding other inputs constant, in the production process.

Total Revenue

The price of a good or service multiplied by the number of units sold.

Marginal Revenue Product

The additional revenue generated from employing one more unit of a resource, factor of production, or input.

Perfect Competition

An industry with so many firms that no one firm has any influence over price, and firms produce an identical product.