How long would it take for the first s-wave to arrive at a seismic station 4,000 kilometers away from the epicenter of an earthquake?

(1) 5 mins
(2) 7 mins 0 sec
(3) 12 mins 40 sec
(4) 13 mins 20 sec

What was darwins theory of common decent

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.

Which of these structures are found in both plant ans animal cells?