What is meant by “insure domestic tranquility” in the Preamble of the U. S. Constitution? to prevent a foreign invasion
to guarantee that Americans enjoy high standards of living
to maintain peace at home by preventing violent disturbances or rebellions
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to prohibit taxation without representation

Look at the map of cities in the united states at the turn of the twentish century what impact did railroads have on cities across the united states at the turn of the twentish century

Which of the following discoveries would be most likely to cause a scientific paradigm shift? a. the discovery of more rings around uranus b. the discovery of a new pathogenic virus transmitted by mosquitoes c. the discovery that a dormant volcano is showing signs of activity d. the discovery of a new species of salamander in the amazon rainforest e. the discovery that excess heat is radiating from the center of the earth and causing global climate change

How many states were there when the constitution was written?