What are the surface features of the ocean floor and how do they know?

Which feature of the Rocky Mountains indicates its relatively young age? How many air craft are there in the National Air and Space Museum? Which European city would one find the bridge of sighs? What is the significance of the bridge in 'A view from the bridge'? What are the consequences of having a lack of tourism planning or poor tourism planning? What do rainforest three toed sloths eat? How heavy is the the leaning tower of Pisa? Is it spelled Smoky or Smokey Mountains? What does the mouth of the Mississippi mean? Are there any rivers that flow through the atacama desert? Are goats in zoos? What Temperate and tropical regions that receive 25-75 cm of rain and have climax communities of grasses? How many gallons of paint did the Sistine Chapel use? Where is the tallest bridge in Alabama? Why is Mississippi called Mississippi river? Where is the Beaulieu National Motor Museum located? Does the river tweed flow into North Sea? What Spanish explorers explored and conquered San Juan Capistrano before it was founded? How long did it take to evacuate the roman Colosseum? What state has the second largest freshwater lake in the US?