What percentage of the world's population cannot find enough food to stay healthy?
A. 14%
B. 5%
C. 34%
D. 70%
Answer: A
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List at least three possible hidden costs associated with burning gasoline in an automobile.
What will be an ideal response?
Which is not an effect of underground water?
A) mass movement B) sinkholes C) caverns in limestone D) underground pockets that gather petroleum
Which of the following correctly lists the order the layers from the surface of Earth toward the center?
A. Asthenosphere, lithosphere, hydrosphere, and the core B. Mesosphere, lithosphere, asthenosphere, and the core C. Asthenosphere, lithosphere, mesosphere, and the core D. Lithosphere, asthenosphere, mesosphere, and the core E. Mantle, crust, core, and the asthenosphere
Catalysts serve to _________ the rate of chemical reactions by _________ the activation energy.
Fill in the blank(s) with the appropriate word(s).