Oversteepened slopes often lead to mass movements because
a. the angle of their slope is between 50 and 60 degrees.
b. plants cannot grow on them.
c. the angle of their slope is less than 50 degrees.
d. the angle of their slope is greater than 40 degrees.

This drawing shows a human body system. what is the primary function of this body system?

Calculate the number of moles of ethane in 100 grams

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils