Are long- or short-term changes in population patterns or characteristics.

What is the relation between the hover dam and the gold rush

What were some effects in world war 1 in europe ? ( and only in europe)

How does the supremacy clause of the u.s. constitution affect the states? o a. it requires each state to establish a supreme court. b. it declares that the federal government can take away state powers if necessary. o c. it allows state governments to overthrow the federal government if necessary. o d. it ensures that the u.s. constitution overrules each state constitution