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Activity 11:
Ocean Ups and Downs
Level: Grade 7-8, but easily adaptable for older (Algebra 1 or Science)
students
Learning Objective: Students will take ocean wave height data from
a map and ocean sea surface height data from the same location on
a different map. They will plot the ocean wave height data versus
the ocean sea surface height data and learn whether waves are largest
where the sea height is high versus where it is low.
Specific Science Content Standards
- Changes in earth and sky
- Motions and Forces
- Structure and evolution of an earth system's history
- Geography: Using maps to acquire and process data
Specific Mathematics Content Standards
- Variables and data
- Plotting and graphing
- Linear equations
Earth Update: Hydrosphere
Introducing the activity:
Tell students that measurements from space can tell us the overall
sea level height, and also the heights of the waves. They can choose
as data points any point at that approximate latitude (note that the
temperature is not uniform for a certain latitude - some areas are
hotter and some are cooler. Note that this activity is a good followon
to Activity 2: Is the Sea Level? , which
has the student explore whether the sea level is higher in warm areas
of earth or cold areas of earth. This activity uses a linear equation
to quantify the relationship between wave height and sea level. (Note
that the two maps use different units - the top map is measured in
meters and the lower map in cm).
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