Answer: Hot air is less dense than cool air; the heated air causes the balloon to rise simply because it is lighter than an equal volume of cold air. Buoyancy is an upward force that the air exerts, and it helps hot-air balloons and blimps stay in the air. A hot air balloon uses a burner to heat up the air inside the balloon.
Answer:
The Native Americans in the Pacific Northwest modified their environment by cutting down trees for houses, clothing, etc. They also hunted animals and caught fish.
Answer:
Explanation: This answer is a little tricky but I think its b
Answer:
Explanation:
what do the actions described in the box indicate about u.s foreign policy
U.S. President Johnson stationed warships off the Dominican coast and increased the number of American troops ashore: President Lyndon Johnson sends more than 22,000 U.S. troops to restore order and to forestall a communist dictatorship
The U.S. CIA urged the Chilean military to take action that the major goal was to fight communism
C. They were laws that segregated blacks and whites in the south
