What Does the Gradual Increase in the Average Surface Temperature

question 14

Multiple Choice

What does the gradual increase in the average surface temperature of the earth reflect?

• A) population growth
• B) increased CO2 levels
• C) the decline of biodiversity
• D) increased urbanization

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Definitions:

Chemical Elements

Substances that cannot be broken down into simpler substances by chemical means, and are defined by the number of protons in their atomic nuclei.

Reddish Streak

The color mark left by a mineral when it is dragged across an unglazed porcelain plate.

Hematite

An iron oxide mineral that is one of the main ores of iron, recognized by its reddish-brown color.

Magnetite

A naturally occurring magnetic mineral, consisting of iron oxide, often mined as an iron ore.