lava that has a rough, spiny, or rubbly surface (A1)
Abiogenic
from a nonliving source, as sand that comes from rock (C1)
Absolute Age
in geology, an age given in numbers as opposed to an age expressed relative to other geological formations (A1)
Abundance
relative degree of plentifulness (M5)
Accrete
build up, as sand on a beach (C1)
Active beach
that part of a beach that is constantly changing (C1)
Adaptation
a change in an organism or species that enables it to survive in a particular habitat (A3, C3, R3, M2,…
Read More
Adaptive optics
telescope equipment that compensates for the effect of turbulence in the lower atmosphere as well as high above the earth’s…
Read More
Adaptive radiation
the rapid development of many species from a single ancestral population (A3, R2, R3, IS1)
Adaptive shift
a discrete step in the process of adaptation (R3)