About how many galaxies have scientists observed in the universe? A. 125
B. 125,000 (125 thousand)
C. Over 125,000,000 (125 million)
D. Over 125,000,000,00 (125 billion)

Which summarizes the relationship between density of an element and its distribution in earth? a. the greater an element’s density, the greater the amount of it found in the crust. b. the denser an elements is, the smaller the amount of it earth core. c. the greater an elements density, the smaller the amount of it’s found in the crust

The 5th term in a series of even number that begin 3x

When you imagine how you'll get from your house to the store, you are a. mental projection b. mental map c. piagetian projection d. cognitive load