According to the online content article about the sun, the sun sustains life on earth by
a.
providing light, heat, and energy
b.
revolving around the earth
c.
causing solar eruptions
d.
harming the earth’s biosphere

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work)

How many years would it take the atlantic ocean to grow 500 centimeters? show your work.

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils