Earth’s mantle a. a layer of molten metal. b. a layer of hot rock. c. a dense ball of solid metal. d. a layer of rock that forms earth’s outer skin.

How did the completion of the transcontinental railroad change the lives of american citizens? a-it increased the wealth of all americans and enabled them to travel more.b-it made cross-country travel too expensive for ordinary americans.c-it decreased the safety of americans who moved to settle the plains.d-it shortened travel time between the east and west for all americans.

In what way did expansion and global trade during the 15th to 18th centuries affect the economies of european countries

How do i do this? true or false? : elephants have the same dna as humans and bananas alike.