global CO2 levels in the past million years were at or higher concentration that they are today (i.e. over 407 ppm). True or False

True or False: Models of the structure and composition of the solar system have changed little since the 1600's.

Questio A population that has an intrinsic rate of growth of 0.32 and a reproductive time delay of 2.6 years will most likely O will exponentially increase into infinity O oscillate initially, but the magnitude of the oscillations will decline over time O oscillate over time as a stable limit cycle O approach its carrying capacity with no oscillations < Previous Next

The graph shows that the atmosphere is currently warmer than it has been in Global Mean Temperature over Land & Ocean 0.6 0.4 0.2 0.0 -0.2 -0.4 -0.6 L 1 1940 1920 1960 anomaly ("C) relative to 1961-1990 1880 1900 O 100 years O 1,000 years O 120 years O 1,200 years year ↓ L 1980 2000