The approximate altitude of auroral displays is:
A) above 500 km.
B) above 1000 km.
C) 80-400 km.
D) below 30 km.
E) about 50 km.
C
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On this southern continent, which side has a plate boundary?
A) The left (west) side
B) The right (east) side
C) Both sides
D) Neither side
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What will be an ideal response?
What can be caused by ENSO events in the eastern Pacific?
a. Productivity increases due to high nutrient upwelling. b. Water temperatures decrease. c. Drought conditions occur. d. Water levels decrease. e. Upwelled water is nutrient-depleted, causing loss of productivity.
The eastern edge of the plain is marked by the __________, a low-lying mountain chain that crosses Russia from the Arctic Ocean to Kazakhstan.
a. Ural Mountains b. Caucasus Mountains c. Eastern Highlands d. none of these is correct e. Central Asian Ranges