How could changes in Earth's tilt influence global climate?
A. A maximum angle of tilt causes Earth to reflect more sunlight into space, causing an increase in glaciers.
B. A minimum angle of tilt causes high latitudes to receive less sunlight during the summer, causing an increase in glaciers.
C. A high angle of tilt causes the continents to move away from the poles, leading to more glaciers.
D. A high angle of tilt causes snow and ice to fall off the planet.
Answer: B
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One of the most important insect pollinators has been ________
A) wasps B) fruit-eating bats C) hummingbirds D) hornets E) honeybees
What evidence shown on the map and stereogram suggests that the material in the deposit does not consist of coherent bedrock? (Hint: Contrast the appearance of the deposit with that of the surrounding mountain front.)
The following questions are based on Map T-26a, a section of the USGS “Spring Hill, Idaho,” quadrangle (scale 1:24,000; contour interval 20 feet), and Figure 38-9, a stereogram of the same region. The map and stereogram show a large mass wasting deposit at the foot of the Pahsimeroi Mountains in Idaho (44°17'39"N, 113°43'02"W).
Although ____________ is the most efficient and sometimes least-costly way to cut trees, it can also harm an ecosystem by causing increased erosion, sediment pollution of nearby waterways, and losses in biodiversity.
Fill in the blank(s) with the appropriate word(s).
When a solution of Cu(II) chloride, CuCl2 , is added to a solution of potassium sulfide, K2S, a black precipitate of copper sulfide, CuS, forms. Which of the following is the total ionic equation for this reaction?
A) CuCl2(aq) + K2S(aq) ? CuS(s) + 2 KCl(aq) B) Cu2+(aq) + Cl22-(aq) + K22+(aq) + S2-(aq) ? CuS(s) + K22+(aq) + Cl22-(aq) C) Cu2+(aq) + 2 Cl-(aq) + 2 K+(aq) + S2-(aq) ? CuS(s) + 2 K+(aq) + 2 Cl- (aq) D) Cu2+(aq) + S2-(aq) ? CuS(s)