____________________ is the name given to the time after sunset (and immediately before sunrise) when the sky remains illuminated
Fill in the blank with correct word.
ANSWER: Twilight?
Environmental & Atmospheric Sciences
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The mountain passes of early Switzerland divided the people from each other
Indicate whether the statement is true or false.
Environmental & Atmospheric Sciences
Which of the following are pioneer species on recently glaciated rock?
A) evergreens and fir trees B) spruce and fir trees C) lichens and mosses D) maples and redwoods E) herbs and shrubs
Environmental & Atmospheric Sciences
The mantle represents 80% of the Earth's volume
Indicate whether the statement is true or false
Environmental & Atmospheric Sciences
The "world ocean" spreads over ________ of Earth's surface
A) 1 percent B) 25 percent C) 75 percent D) 90 percent E) 100 percent
Environmental & Atmospheric Sciences