Trilobites are index fossils because they

Which feature do the mediterranean countries have in common

Why must we use non-renewable resources with great prudence

A defining characteristic of sympatric speciation is Group of answer choices a. The appearance of new species in the midst of old ones b. Asexually reproducing populations c. Geographic isolation. d. Artificial selection e. Large populations

Faults are A) cracks where pieces of the Earths crust move past each other due to tectonic forces. B) found only in the center of the earth's continents C) cracks that prevent tectonic forces from moving pieces of the earth's crust D) found only in

What type of crust can be found on the South American plate where it meets the Nazca plate

The two aliens below have offsprings. Will the offsprings inherit a tattoo?

In the study of geomorphology, why do we primarily concentrate on process rather than on distribution patterns by latitude?

Pause the time when the Moon has risen, then click the Moon to display its data in the upper left. What time is it when the Moon is fully visible (complete disc) on the eastern horizon?

What is the only south america country lying completely south of the tropic of capricorn?

What statement is true about earth's tectonic plates? a) they are floating on the lithosphere. b) they are floating on the asthenosphere. c) they are stable and do not move. d) they are floating on the core.