Ecological succession after a disturbance usually takes hundreds of years in the Pacific Northwest. However,
succession after the Mount St. Helens eruption in 1980
has progressed much more rapidly, because some plants
and animals were in protected areas when the hot ash
and pumice fell. What conclusion can you draw about the
pace of succession from this example!

(select all the correct choose each statement that is scientific. - the opinions of randomly selected participants in a survey prove the idea that global temperatures are not increasing on earth. - the universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago. - ocean tides are caused by the uneven gravitational pulls of the moon and sun on different parts of earth. - human life is more valuable than other forms of life on earth because humans are more intelligent than other organisms.