You are asked to do a field study of a region of the Midwest United States that is thought to have once been covered by a glacier. Which of the following observations about the area would help confirm the hypothesis that a glacier once covered this region? (Check all that apply.)A) Local topographic maps show several moraines in the area.B) Historical weather records indicate the area experiences heavy snowfalls during the winter.C) Many farmers report encountering a layer of unsorted, rocky till material when plowing their fields.D) The local bedrock is mostly composed of fine-grained sandstones.
What will be an ideal response?
A, C
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What is the most important of the indigenous language groups of Sub Saharan Africa?
A) Nilo-Saharan
B) Khoisan
C) Indo-European
D) Niger-Congo
E) Austronesian
When driving on a foggy night, it is often difficult to see the road when the high beam lights are on. Which of the following processes explains why this happens?
A. transmission of light by the fog B. absorption of light by the fog C. refraction of light by the fog D. scattering of light by the fog
Which of the geologic principles listed here is incorrectly defined?
a. The principle of cross-cutting relationships states that the fault or intrusion that cuts across several rock layers is older than these layers. b. The principle of superposition states that in an undisturbed sequence of rock layers, the older layers are at the bottom of the sequence and the younger layers are at the top. c. The principle of lateral continuity states that sedimentary beds originate as layers that extend in all directions until they thin out at the edge. d. The principle of inclusions states that an inclusion within a rock layer is older than that layer. e. The principle of original horizontality states that sediment is initially deposited in a horizontal position.
Russia is the largest country in physical area-almost three times the size of the United States.
a. true b. false