Question 4: Africa has total land area of approximately 30.3 million square kilometre, it
stretches
(A) 8,000km East West 75,000km North South
(B) 8,000km North South, 7,500km East West
(C) 7,500km North South 8,000km East-West
(D) None of the above
(E)

Which factors add to the greenhouse effect and are caused by human activities?

The vegetation that thrives in the tundra is limited to a. mosses, barley, wheat, and corn. b. coniferous trees. c. dwarf shrubs, mosses, lichen, potatoes, and beans. d. mosses, lichen, algae, and dwarf shrubs.

15 points need quick 1. looking at your graph and the geologic time scale during what period did this rock form? what is the age span of the rock, in millions of years? 2. this rock sample is limestone and shale. with what you know about rock formation, what type of environment did these organisms live in? 3. if some of these fossil samples were found in a rock also containing leaf fossils, could you use radiocarbon dating to determine the age of this rock? explain.