What are the two main forces that cause surface changes on earth?
a. erosion and plate tectonics
b. chemical and physical weathering
c. plate tectonics and weathering
d. weathering and erosion

Which environment would most likely not contain fossils? a a thick deposit of cracked, dried mud b sediment deposited in a sandy river bed c intrusive rock formed from cooled magma d layers of sand accumulated for a century

What factors influenced brazil's current and future economic strength?

Select the word from the list that best fits the definition a mountain range in northeast central asia answer is altay shan