We know from the Apollo missions and unmanned probes that the moon's surface is covered with loose, unconsolidated material with a texture similar to soil on earth. How did this material form on the moon?
A) The material is mostly volcanic ash ejected from volcanos that are no longer active.
B) The loose material is mostly micrometeorite fragments and ejecta from impact craters, so is very different from soil on Earth.
C) The material is produced by spalling from rock surfaces caused by the extreme heat-cold cycles as the moon rotates through a 1 lunar day, or approximately one Earth month.
D) The same as Earth, but soils are ancient from a time when the moon still had an atmosphere and water.
B
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Answer the following statement true (T) or false (F)
The breakdown of materials of Earth's crust into smaller pieces
Global temperature trends can be inferred from changes in ________ and ________
A) volcanic eruptions; isotope ratios in glacial ice B) volcanic eruptions; fossils C) fossils; hydrogen and oxygen isotopes found in sediments and glacial ice D) fossils; isotope ratios in glacial ice E) fossils; chemical isotopes found in sediments and glacial ice
The greater the amount of soil colloids in a soil, ________
Fill in the blank(s) with the appropriate word(s).