The Earth's interior can be divided into three distinct layers. Which layer is the densest one?
a. Crust
b. Mantle
c. Core
d. They exhibit the similar density
Answer: c. Core
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Food production, transportation, home energy use and resource use have major impacts on the environment. Give two examples of how you can reduce your environmental impact for each activity.
What will be an ideal response?
Which of the following would be a negative ion with a single charge?
A) an atom with 11 protons and 12 electrons B) an atom with 11 protons and 11 electrons C) an atom with 12 protons and 11 electrons D) an atom with 10 protons and 12 electrons E) none of the above
The weather event that annually takes the most human life is the:
A) hurricane. B) tornado. C) flood. D) lightning. E) extreme cold.
In a cyclone, ____
a. upper air flow converges b. winds spiral clockwise in the Northern Hemisphere c. winds diverge at the surface d. pressure decreases toward the center e. pressure increases toward the center in the Southern Hemisphere