Sea level

High school (ages 12+)
Environment & Earth

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/sea-level

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the definition?Mean Sea Level (MSL) is a reference datum for measuring elevation
2. What is the geodetic role?Forms the basis for vertical datums in cartography and navigation
3. What is sea level and why is it important?Sea level is how high or low things are compared to the water. It is used for maps, navigation, and shows how the climate is changing.
4. How do scientists find the mean sea level?They use tide gauges that record the sea’s height for many years. The data are averaged to smooth out tides, waves, and weather.

Geodetic Datum: A reference system used to define locations and elevations on Earth's surface.
Oblate Spheroid: A sphere that is flattened at the poles and bulges at the equator.
Gravity Anomalies: Variations in Earth's gravitational pull due to differences in mass distribution.
Thermal Expansion: The tendency of matter to increase in volume when heated.