Explain how iron meteorites can be distinguished from common rocks of earth's crust

answer: They can be distinguished from common rocks of earth's crust because they do not contain the common earth mineral quartz, and in general do not contain vesicles. When gas escapes from cooling molten material, it creates small pinprick holes or cavities in a rock's surface.

(happy to help)

Explanation:

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 

which fault and or fold did you find most difficult to diagram