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A meteoroid,heading straight for Earth,has a speed of 14.8 km/s relative to the center of Earth as it crosses our moon's orbit,a distance of 3.84 × 108 m from the earth's center.What is the meteroid's speed as it hits the earth? You can neglect the effects of the moon,Earth's atmosphere,and any motion of the earth.(G = 6.67 × 10-11 N ∙ m2/kg2, Mearth = 5.97 × 1024 kg)
Microevolution
Change in the genetic makeup of a species or a small group of organisms over a brief time period, regarded as evolutionary.
Speciation
Evolution of a new species.
Mass Extinctions
Events in Earth's history where large numbers of species become extinct worldwide in a relatively short geological timeframe, drastically reducing biodiversity.
Environmental Factors
Encompasses all external elements and conditions affecting an organism's life, from climate to food availability.
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