Which of the following phenomena appears as a ring of light encircling the sun or moon?

A. either a halo or a sundog
B. either a halo or a corona
C. either a rainbow or a halo
D. either a sundog or a crepuscular ray


Answer: B

Environmental & Atmospheric Sciences

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Explain the principle of limiting factors. Identify examples of biological limiting factors and examples of physical limiting factors

What will be an ideal response?

Environmental & Atmospheric Sciences

Air pollution comes from ____________________ and ____________________ sources

Fill in the blanks with correct word

Environmental & Atmospheric Sciences

Why is iron not abundant in the ocean?

a. It is trapped in the Earth's crust. b. It is held in sediments. c. It is nearly insoluble in oxygenated water. d. It is not very reactive.

Environmental & Atmospheric Sciences

The diagram below illustrates the point that the cows are



A) first-level heterotrophs.
B) second-level heterotrophs.
C) primary producers.
D) keystone predators.

Environmental & Atmospheric Sciences