In which of the following locations can precambrian-aged rocks be found? select all that apply. a. australia b. grand canyon, arizona c. lake huron in ontario, canada d. hudson bay in quebec, canada e. black canyon, colorado f. glacier national park, montana

What is a boundary between geologic units called

Carbon dioxide, a greenhouse gas, to

What does the above chart explain about migration trends? a. it shows that migration did not start until modern technology was developed. b. it shows that agricultural societies are the most developed societies. c. it shows that as human needs and resources change, societies develop differently. d. it shows that having a strong artistic culture will not increase migration to a region