The element that is the second most abundant in Earth's crust is
a. oxygen.
b. iron.
c. nitrogen.
d. silicon.
d
Physics & Space Science
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In addition to revolving around the Sun counter clockwise, most planets also rotate on their axis counter clockwise
Indicate whether the statement is true or false
Physics & Space Science
The three most common cementing agents in a sedimentary rock are
A) silica, calcite, and hematite. B) calcite, silica, and iron oxide. C) silica, carbonate, and feldspar. D) silica, iron oxide, and sandstone.
Physics & Space Science
Describe two ways that plants and other living things depend on water?
Physics & Space Science
Radioactivity Basics: The atom 
Fr decays to 
Ra by emitting what kind of nuclear radiation?
A. alpha B. beta-minus C. beta-plus D. gamma E. x-rays
Physics & Space Science