Using the photographs of the four rock samples on the course website, order the samples from youngest (1) to oldest (4). Rock sample 1 (10b-1); rock sample 2 (10b-2); rock sample 3 (10b-3); rock sample 4 (10b-4). a. 10b-1
b. 10b-2
c. 10b-3
d. 10b-4

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

What benefits does this type of farming have?

Which revelation resulted from the observation of the spectrum of different galaxies? a. there were more galaxies whose spectrum was blueshifted b. there were no galaxies whose spectrum was redshifted c. there were more galaxies whose spectrum was redshifted d. there were no galaxies whose spectrum was blueshifted