What is an aerial burst?
A) an explosion in the asteroid belt that sends asteroids hurtling toward Earth
B) a secondary explosion above an impact crater, occurring after impact
C) a meteor bursting into many smaller pieces when bombarded with nuclear weapons
D) an explosion of a meteor entering the Earth's atmosphere
D
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The geothermal gradient is the rate at which pressure increases with increasing depth beneath the surface.
Answer the following statement true (T) or false (F)
You are out camping in a remote area. The next day, you plan to hike the mountain trail and return to camp before dusk. Your friends suggest that after hiking, you might want to enjoy a warm shower. They suggest that before you head out in the morning, you should suspend a strong, black cloth bag full of about 5 gallons of water, so that it sits in sunshine all day. When you return, the water should be warm, and you can enjoy a luxury because of good planning. It works and you are delighted and refreshed! The process that you used to get a warm shower illustrates
A) passive solar heating.
B) active solar heating.
C) solar space heating.
D) flat-plate collection
The evolution of pesticide resistance, resurgence, and secondary-pest outbreaks are only some of the problems that result from reliance on
A) crop rotation and biological controls, which disrupt the natural dynamics of ecosystems. B) pesticides, creating the need to alternate between a pesticide and an herbicide every other year. C) rodenticides to kill weeds and insect pests and prevent the spread of viral diseases. D) pesticides, creating a never-ending pesticide treadmill and requiring new pest-fighting strategies.
GPS stands for
a. Global Positioning System. b. Global Positioning Satellites. c. Geophysical Pollution Safety. d. Geologic Pollution Safety. e. Geographic Place Survey.