Positive and Negative Numbers Above and Below Sea Level

This lesson explains how positive and negative numbers relate to elevation by examining distances above and below sea level. Elevation is defined as height, with sea level representing zero elevation. The video uses examples like mountains, fish, planes, and submarines to illustrate how elevation can be positive or negative. It also highlights that elevation is a comparison to sea level, which is the ocean's height. The lesson concludes with a volcano example, showing elevation from the ocean's bottom to its surface.

What does elevation refer to in the context of this lesson?

• The distance between two mountains

• The height above or below sea level

• The width of a river

• The depth of the ocean

How is a mountain's elevation of 150 feet above sea level represented on a number line?

• As a negative number

• As zero

• As a positive number

• As a fraction

If a fish is swimming at 65 feet below sea level, how is this elevation represented?

• As 65 feet above sea level

• As zero

• As a negative number

• As a positive number

What is another term used for elevation when discussing planes?

• Latitude

• Altitude

• Depth

• Longitude

How is a submarine's position at 10,000 feet below sea level described?

• As 10,000 feet above sea level

• As zero elevation

• As a negative elevation

• As a positive altitude