What are downbursts?
a. strong, localized winds associated with thunderstorms
b. storms that occur primarily in the western united states
c. intense rotating updrafts
d. precipitation in the form of balls or lumps of ice

Does the threat of global warming require international cooperation? why or why not?

8. is a technique that uses the images from several telescopes to produce a single image. a. reflection b. interferometry c. radiation d. refraction

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.