The process by which sediment becomes rock is called
a. striation.
b. lithification.
c. foliation.
d. deposition.

Which of the following can scientists estimate geologic time? a.observing rock sequences b.radiometric dating c.comparing fossils d.all of these

Because its government strictly controls its economy, north korea has a economy. a. command b. mixed c. traditional d. free market

According to the article about the zhou dynasty, this dynasty was broken into different eras because its capital changed from place to place. how many different eras were there in the zhou dynasty? a. two b. six c. ten d. fourteen