Which of the following statements characterizes an equinox?
A. The days and nights are of equal length except at the poles
B. The days and nights are of unequal length except at the poles
C. The Earth is tilted toward the sun
D. The Earth is tilted away from the sun
Answer: A
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Once they are a year old, many small songbirds such as goldfinches and house finches have approximately a 50% probability of surviving to the following year, regardless of the bird's age
Which survivorship curve in the figure best represents such birds? A) Line A B) Line B C) Line C D) None of the above
Which of the following is the chemical symbol for most of the salt in oceans?
A) NaCl B) Cl C) K D) Mg E) U
When a boulder and a pebble are dropped, the pebble falls as fast as the boulder because
A. both accelerate equally. B. both pick up speed equally. C. its ratio of gravitational force to mass is the same as the boulder's. D. air resistance is less for the pebble.
If you are at 18°S latitude, on what dates will the noon Sun be directly overhead?
Use the analemma. What will be an ideal response?