cardinal direction: - a term used to describe all four primary directions (north, south, east and west).

daylight saving: - a way states and countries change their clocks in spring and fall to make better use of daylight. It moves an extra hour of daylight to afternoon during March to October. This helps people who work outside. Daylight saving time also conserves energy, moving activities into the daylight so we do not need to use lights. Not all places participate in daylight saving time.

estuary: - the meeting place for fresh water (rivers) and salt water (oceans). Many cities located at estuaries have become important centers of commerce due to the convenience of the port.

hybrid map: - a map that combines satellite images taken of the earth from space with lines for roads and markings and names of landmarks.

map scale: - a graphic or line that shows the relationship between the distance on a map and the corresponding distance on the earth. For example, 1 inch may equal 500 miles. This allows users to calculate the approximate distance between two locations on a map.

scale: - shows the relationship between the distance on a map and the corresponding distance on the earth. For example, 1 inch may equal 500 miles. This allows users to calculate the approximate distance between two locations on a map.

suspension bridge: - a bridge that is created by using a deck supported by large cables hung from the towers. The Brooklyn Bridge is one of the oldest suspension bridges in the United States (built from 1870 - 1883). It is 5,989 feet long.