Airplanes: during read-backing do you put your call sign in the front or in the back of the read-back? a. front b. back

Arguably one of the most important inventions of the 20th century was a) the transistor. b) air conditioning. c) the vacuum cleaner. d) radio broadcasting.

Which statements explain reasons why unconformities occur? check all that apply. rocks along a fault break and move. igneous rock forms at earth’s surface. rocks erode and sediment is deposited. no sediment is deposited over a long time. igneous rock forms between sedimentary layers.

Which of the following statements os an example of how climate and vegetation influence lifestyles? a. many south koreans enjoy watching american films and listening to american music. b. many mongolians are pastoral nomads who raise livestock for a living. c. many chinese peasants are moving to cities in search of better jobs opportunities. d. many north koreans wish to see relatives now living in korea.