Plant productivity is greatest in natural ecosystems when ________
A) the ecosystems are converted into cropland B) an invasive plant grows unchecked
C) endemic species are present D) more species are present
D
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Indicate whether the statement is true or false
The lithosphere is best defined as:
a. a thin layer of material of low density that accumulated near the earth's surface during differentiation b. a thin layer within the mantle that is near the melting point and, therefore, deforms as a plastic c. the boundary between the crust and the mantle d. a rigid upper layer of the earth that moves over the earth's surface above the plastic asthenosphere
Based on the seafloor features labeled on this map, what kind of tectonic boundary would you say surrounds the Pacific Ocean basin?
A) Convergent B) Divergent C) Transform
The wavelength of light emitted from a distance object is related to ________
A) the energy of the source—more energetic source has lower wavelength emissions B) distance of the source—the farther away the object is, the lower the wavelength observed related to changes in electromagnetic energy over time C) gravity—gravity bends electromagnetic waves causing refraction and sorting of wavelengths D) the energy of the source—more energetic source has higher wavelength emissions