The problem of using more of a resource in a year than its annual renewal, growth, or replacement is known as ____
a. natural hazard
b. dynamic equilibrium
c. pollution
d. environmental overshoot
e. sustainability
d
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Ozone is concentrated in the ________
troposphere mesosphere stratosphere ionosphere
Several of the moons of Saturn, Uranus and Neptune display evidence of volcanic activity. What is the most common type of volcano on these moons?
A) basalt shield volcanos B) ice volcanos C) pyroclastic eruptions of rhyolitic silicate material D) sulfur volcanos
In middle latitude (temperate) oceans, primary productivity is limited by ________ in the spring and by ________ in the fall
A) available sunlight; available sunlight B) available sunlight; nutrient supply C) nutrient supply; available sunlight D) nutrient supply; nutrient supply
Which of the following parts of an atom has a negative charge?
a. Proton b. Neutron c. Electron d. Hydrogen