Which types of seismic waves are the first to be felt and are known to travel by creating regions of compression and rarefaction in the earth?

a. primary waves b. surface waves c. sound waves d. secondary waves

stratosphere: as the altitude increases, the air temperature increases. the stratosphere has a layer of ozone, called the ozone layer. this layer absorbs most of the ultraviolet radiation from sunlight. this results in the stratosphere being warmer.

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg 

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it