Explain the process of density stratification as it applies to the formation of Earth. What will be an ideal response?
During the accretion phase in the formation of Earth, gravitational compression combined
with radioactive decay caused Earth to partially melt. Gravity pulled most of the heavier
elements, such as iron and nickel, inward to form the planet’s core. Lighter elements, such as
silicon, magnesium, and aluminum, rose toward the surface, forming Earth’s crust.
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Ecological economists argue that it would be easy to find substitutes for many important ecosystem services and resources.
Answer the following statement true (T) or false (F)
The oldest oceanic lithosphere in the Atlantic Ocean is located along the continental margins.
Answer the following statement true (T) or false (F)
Bacteriovores, carnivores, herbivores, and omnivores are types of ________ organisms
A) autotrophic B) consumer C) decomposer D) producer E) siliceous
For most domestic animals, trophic-level efficiency is usually ________
A) approximately 30% B) greater than 10% C) less than 10% D) approximately 20% E) dependent on what the animals were fed