Tidal Graphing
The following tide measurements were collected in San Francisco Bay.
The height measurements report feet above or below “normal” water level.
Graph the data using Xcel.
Include all of the necessary requirements for a good graph.
Tide fluctuations over time San Francisco Bay
Data Point Height (ft.)
1.3
1.
4.3
2.
0.3
3.
5.2
4.
0.5
5.
4.4
6.
0.5
7.
5.8
8.
-0.3
9.
10. 4.5
11. 0.7
12. 6.3
13. -1
14. 4.4
15. 1
16. 6.7
Questions:
1. What is the high tide in feet?
2. What is the low tide in feet?
3. What is independent variable?
4. What is the dependent variable?
5. At what data points in the graph would you think the spring tides occur?
6. Label this area on your graph.
7. At what data points in the graph would you think the neap tides occur?
8. Label this area on your graph.
9. At what point would you expect there to be a full moon?
10. Label this area on your graph.
11. At what point would you expect there to be a quarter moon?
12. Label this area on your graph.