At one time the earth's atmosphere contained no free oxygen
Indicate whether the statement is true or false
TRUE
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Which of the following is a way that slopes fail?
A) Large blocks fall from cliffs B) Rocks, soil, sediment, and ice slides down steep hillsides C) Pieces of loose rock accumulate on talus slopes until the angle becomes too steep D) Soil and other loose material can flow rapidly down slopes, forming debris flows E) All of these are correct.
Germany has decided to close all of its nuclear power plants and use ________ instead.
A. Fossil fuels B. Wind energy C. Geothermal power D. Hydroelectricity E. Solar energy
Soil moisture that plants are capable of accessing and using is called
A) wilting point water. B) free molecular water. C) capillary water. D) hygroscopic water.
Asteroids are generally rocky, solid bodies orbiting the Sun and ranging in diameter from a few meters to hundreds of kilometers.
Answer the following statement true (T) or false (F)