Select all of the answers that apply.

What are the possible causes of the Late Devonian extinction?

a. asteroid hitting the earth

b. sea level changes

c. overpopulation of sea organisms

d. growth of land forests

e. climate changes

Astronomers detect a large asteroid that's far away but still heading toward earth at 754 m s. a straight trajectory would bring it within 3.3 * 108m of the earth (about the orbit of the moon).

What was the initial goal of apartheid? Ensure a balanced system of representation for all people Maintain white domination and extend racial separation Create a fair system of leadership Institute new trading practices to benefit the most people

Scientists discovered that the minerals on the moon probably came from___.

These physical characteristics have played a role in the region's environmental problems. Select all that apply. abundant precipitation arid climate fertile soils oil resources

Active volcanos are often form where

What are the most wide spread Paleozoic fossils?

Less developed nations are to extended families as more developed nations are to nuclear families. matrilineal families. families of procreation.

If star a has an apparent magnitude of - 6 and star b has an apparent magnitude of 5, which star is brighter in our sky?

What is one advantage of free trade?

Explain how the shading of the direct light of the sun causes a lunar eclipse.