Global warming is caused when gases released by burning fossil fuels such as coal and oil remain in the upper atmosphere, trapping heat reflected from Earth.
a. true
b. false
a. true
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What was Eisenhower's reason for sending federal troops to Little Rock?
A. to endorse desegregation to the public B. to uphold authority and enforce the law C. to force a confrontation D. to prevent violence by closing the school
The rise of Islam transformed Axum into a maritime power
a. True b. False Indicate whether the statement is true or false
An important reason that American settlers moved to Oregon was:
a. Dr. John McLoughlin publicized Oregon after gold was discovered b. hard times of the 1840s caused a drop in farm prices, and Oregon offered cheap land c. the federal government rejected local Indian tribal land claims d. Spanish missions offered a hospitable point of entry for whites
The piece of land that provided the feudal vassal's economic support was the
a. fief. b. tallage. c. homage. d. vassalage. e. right.