Dissolved oxygen concentration is highest near the surface because
1.that’s where it comes in contact with air.
2.this is where whales release oxygen when they “blow.”
3.warmer water there holds more dissolved oxygen.
4.phytoplankton photosynthesize there.
4
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Which of the following describes sun halos?
A. They are most common during clear skies. B. They require a layer of ice crystals. C. They are caused by reflection of light. D. They are usually found near the horizon.
Earth's interacting subsystems or "spheres" are the
A. lithosphere, atmosphere, hydrosphere, biosphere, and ecosphere. B. lithosphere, hydrosphere, atmosphere, and biosphere. C. lithosphere, hydrosphere, and atmosphere. D. biosphere, lithosphere, and atmosphere.
Discuss biologists’ definition of “species.” What does this definition imply? Give an example of a species and discuss
binomial species names. What will be an ideal response?
Explain how the rock cycle relates to the theory of plate tectonics. What will be an ideal response?