After 100 years of plankton studies which used small nets to capture the tiny
floating creatures, what major plankton discovery was made in the 1990's of a
type more numerous than any other?
✓ bacterial nanoplankton
The great acceleration pertains to the rapid human population increase. It has
become apparent that human driven change is effecting the rate of processes on
Earth. Choose from the following all the true statements about the "global
scale" impacts of humans? (select more than one)
✓ -the human impacts operate on much faster time scales than rates of natural
variability, often by an order of magnitude or more
✓ -the human impacts taken together in terms of extent, magnitude, rate and
simultaneity, have produced a no-analogue state in the dynamics and functioning of
the Earth system.
✓ -the human impacts are approaching or exceeding in magnitude some of the great
forces of nature
Science ethical practices are guided by several factors. (select all that apply from
Early in the 20th Century chemists created a new formulation for gasoline that
made engines run much smoother by adding dissolved mercury.
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