The oldest known fossil ____________________, the only flying mammal, is from rocks of Eocene age. Fill in the blank(s) with the appropriate word(s)
bat
Environmental & Atmospheric Sciences
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The measure of how harmful a substance is called its ____________.
Fill in the blank(s) with the appropriate word(s).
Environmental & Atmospheric Sciences
The world's rivers with the largest dissolved load occur in
A) Africa. B) South America. C) Asia. D) North America. E) Europe.
Environmental & Atmospheric Sciences
Which of the following features is associated with a deep oceanic trench?
A. seamount B. mid-ocean ridge C. island arc D. linear island chain
Environmental & Atmospheric Sciences
Fountains in ponds may be pretty and also help
A. dredge polluted sediment. B. add oxygen to the water. C. remove oxygen from the water. D. filter the water.
Environmental & Atmospheric Sciences