a low island or low island group

The water temperature for the Gulf of Mexico (West Coast) ranges from the high 50s to high 60s. The Atlantic Ocean(East Coast) waters average mid-to-high 50s from Central Florida north. The beaches to the south - West Palm Beach, Miami and The Keys - are always several degrees warmer than those in North Florida. Source: http://goflorida.about.com/od/allaboutflorida/a/january.htm

In the Wikipedia definition it is not technically in the classic sense. The Keys are not "tectonic" in nature, but a natural formation of coral and the accumulation of vegetation and sand. Wiki says that the classic definition has now been expanded to include any accumulation of islands, especially those clusters close to main bodies of land. So in today's definition, yes, the Keys are an archipelago.

what is the distance from keys Florida to Orlando Florida.

Key West to Ft Lauderdale is 189 miles and is a 3 hour and 45 minute drive.

[Source: Mapquest]

There are many miles between the Florida Keys and that location of Miami, Florida. It is a bit farther than Titusville, but not as far as Jacksonville. It is accurately about 169.55243 miles away.

A typical flight between Orlando, Florida and Las Vegas would have a flying time of about 4 hours, 4 minutes. This assumes an average flight speed for a commercial airliner of 500 mph, which is equivalent to 805 km/hr or 434 knots. Your exact time may vary depending on wind speeds.

The distance between the above places is 6989 miles. This distance is point to point straight distance. The actual distance may vary according to the flight path chosen. Also this is not the airport to airport precise distance.

The Florida Keys start at the southeastern tip of the Florida peninsula, about 15 miles (24 km) south of Miami, and extend in a gentle arc south-southwest and then westward to Key West, the westernmost of the inhabited islands, and on to the uninhabited Dry Tortugas

25,478

The Keys are 120 miles long. Gainesville to Key West is about 500 miles.

The Keys are 120 miles long. Tampa to Key West is 425 miles.

It is 58 Nautical Miles from the tip of Grand Bahama Island to West Palm Beach, Florida.

The name is derived from the Spanish word "cayo" meaning small island.
Cayo Hueso (Spanish pronunciation: [ˈkaʝo ˈweso]) is the original Spanish name for the island of Key West. Spanish-speaking people today also use the term Cayo Hueso when referring to Key West. It literally means "the Island of Bones". It is said that the island was littered with the remains (bones) from a Native American battlefield or burial ground. The most widely accepted theory of how the name changed to Key West is that it is a false-friend anglicization of the word, on the ground that the word hueso [ˈweso]) sounds like "west" in English.[2] Other theories of how the island was named are that the name indicated that it was the westernmost Key,[3] or that the island was the westernmost Key with a reliable supply of water

Cancun IS in the Yucatan peninsula, in Mexico. Distance is therefore, zero.

Florida was named by Spanish conquistador Ponce de León, who was the first European to record its location, on April 2, 1513. He believed it to be a large island. He called it "La Florida" (flowery land) referring to the Easter season, which in Spanish is Pascua Florida.

tons of pollution...or killing coral reef ecosystems by touching them

or dropping anchors on them(:

Depending on your exact starting point & final destination, From Orlando to Key West is 393 miles with 6 hours of driving time depending on traffic, weather & other random stops.

Some producers are seagrass, algae, moss, grass, etc. Some animals that eat these producers are the great white shark, manatees, whales, dolphin, fish, etc.

Google Maps estimates the driving time as 5 hours and 12 miles and give the road distance as 248 miles.