Question

Geologic and current data provide evidence that Earth's temperatures:

A) Have always fluctuated, but we are currently in a downward temperature trend.
B) Have consistently risen over time.
C) Show no discernible patterns or trends.
D) Are steadily decreasing.

Answer 1

Geologic and current data show that Earth's temperatures have consistently risen over time. Measurements from NOAA and NASA indicate a more than one-degree increase in surface temperatures over the past 100 years. The shrinking of glaciers and other observable effects also provide evidence of global warming. Hence, the correct answer is option B.

Step-by-step explanation:

Geologic and current data provide evidence that Earth's temperatures have consistently risen over time. Data from the National Oceanic and Atmospheric Administration (NOAA) and the National Aeronautics and Space Administration (NASA) indicate that the Earth's surface temperatures have increased by more than one degree in the past 100 years.

Direct evidence for global warming comes from measurements of global land and ocean temperatures, which show an overall warming trend since the late 1800s. Indirect evidence for global warming comes from observations of its effects, such as the shrinking of glaciers over the past century or so.