The core is probably composed mainly of
A. oxygen
B. silicon
C. sulfur
D. iron
Answer: D
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Where in a lava lamp would the density of both materials be equal?
a) almost everywhere in the lamp b) near the bottom of the lamp c) near the middle of the lamp d) near the top of the lamp e) nowhere in the lamp
Pebbles can be moved by ________ in a process known as ________
A) deflation; saltation B) deflation; surface creep C) saltating particles; deflation D) saltating particles; surface creep
A landslide warning system recently tested in California could identify the areas at risk, but could not predict the time of probable sliding.
Answer the following statement true (T) or false (F)
Which factor best explains the difference in sea ice (shown in white) between March in the northern hemisphere and March in the southern hemisphere?
A. seasonal variation in daylength B. low sun angle throughout the year C. high albedo for all surfaces D. continentality for all surfaces