Examlex
The most effective method of calculating the rate of tectonic plate movement is to measure the thickness of a rock unit and divide that thickness by the age of the rocks.
Ammonification
The conversion of nitrogen-containing organic compounds to ammonia (NH3) by certain soil bacteria (ammonifying bacteria); part of the nitrogen cycle.
Nitrogen Fixation
The conversion of atmospheric nitrogen (N2) to ammonia (NH3) by certain bacteria; part of the nitrogen cycle.
Ecological Pyramids
Graphical representations showing the relative amounts of energy or matter contained within each trophic level in a given ecosystem.
Pyramid of Numbers
A graphical representation showing the number of organisms at different trophic levels in an ecosystem, typically decreasing from producers to top predators.
Q8: The Ediacaran fauna of Australia includes many
Q25: Compare and contrast the igneous rocks basalt
Q30: The time in Earth's history before 4
Q47: Time units are rock units that were
Q50: Which scientist used a mathematical model and
Q54: Ediacaran faunal fossils are rare because they
Q224: Which of the following is true?<br>A) The
Q333: What common goals, if any, do labor
Q411: During the last two decades, the number
Q432: Measured as a share of the labor