How did the invention of the steam engine first improve land transportation? A. It was used to power the steam car.
B. It was used to power the first trains.
C. It was used to power the Model T Ford.
D. It was used to power the horseless carriage.
Please select the best answer from the choices provided.
A
B
С

Gold is not now being extracted from seawater. why not? a. it would be too disruptive to marine life to develop any marine mineral resources b. there is no gold in seawater c. we don't know how to extract minerals from seawater d. it would be too costly and difficult to separate the small amount of gold from the very large amounts of halite and other minerals

Compounds which are found naturally in the earth are called: a. ores b. composites c. rocks d.minerals

Acivilization exists for several hundred yeaars, developing its own language. such a civilization probably has been: a. farming corn b. suffering from a lack of contact with the outside world. c. isolated by mountains or some other physical barriers. d. starving from lack of trade.