Cross beds in sandstone rocks can be indicative of an ancient desert climate.
Answer the following statement true (T) or false (F)
True
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How is the composition of Earth's present-day mantle used to support the magma-ocean hypothesis?
What will be an ideal response?
Given recent trends in communications, in the next five years the number of television programs viewed over the Internet might be expected to
A) remain about the same. B) decrease slowly as the number of broadcast television stations increases. C) decrease slowly as cable and satellite television services offer more channels. D) decrease dramatically. E) increase dramatically.
The transition from one climate region to another on Earth's surface is usually abrupt and easily recognized
a. True b. False Indicate whether the statement is true or false
Deforestation of rain forests exposes tropical soils that are famous for their low fertility, despite the fact that they had previously hosted a lush tropical forest. Which soil type would describe these soils?
A) Andisols—young soils formed on volcanic ash and volcanogenic sediment B) Histosols—Organic soils with little or no climatic implications. Can be found in any climate where organic debris can accumulate to form a bog soil. Dark, partially decomposed organic material commonly referred to as peat C) Vertisols—Soils containing large amounts of clay, which shrink upon drying and swell with the addition of water. Found in subhumid to arid climates D) Oxisols—Soils that occur on old land surfaces unless parent materials were strongly weathered before they were deposited. Rich in iron and aluminum oxides, Oxisols are heavily leached, hence are poor soils for agricultural activity