Figure 2.2 -Refer to Figure 2.2 (First Three Rows of the Periodic

question 30

Multiple Choice

Figure 2.2
-Refer to Figure 2.2 (first three rows of the periodic table) . If life arose on a planet where carbon is absent, which element might fill the role of carbon?

• A) boron
• B) silicon
• C) nitrogen
• D) aluminum
• E) phosphorus

---

Definitions:

Snow Line

The lowest altitude area on a mountain where snow remains throughout the year.

Region's Climate

The average weather patterns and conditions typically experienced in a specific geographic region over a long period.

Average Precipitation

The mean amount of rain, snow, or other forms of water falling to the ground in a given area over a specified period.

Average Temperature

A calculated central value of a set of temperatures over a specific period, giving an overall indication of climate.