Student Worksheet

Tidal Research Part A

1.      What is the effect of the moon and sun on earth's water?

2.      Does the moon or the sun have the greatest effect on water and why?

3.      How come we can predict when the tides will be high or low?

4.      What is a tidal range?

5.      Use a picture which includes the earth, sun and the moon, describe the difference between a spring and a neap tide.

6.      What is the difference between tides and tidal currents?

7.      Are tides and waves related?

Tidal Research Part B

8.      Write your prediction in the chart below, with your supporting reasons:

Tidal Research Part C

9.      Looking at the hourly heights predicted in the table at the bottom of the print outs, fill out the following chart for a 24 hour period.

Location	Tidal Range for each location	1st  Max Tide Height	Time of 1st Max Tide	2nd Max Tide Height	Time of 2nd Max Tide
Bamfield
Beecher Bay (Race Rocks)
Nanaimo

10.  Using the information from the hourly heights table determine the differences in the times that high tide was reached at the following locations:

1.      Bamfield to Race Rocks
2.      Race Rocks to Nanaimo
3.      Bamfield to Nanaimo

Average the Mean Annual Surface Salinity for each year

Part B

1.       In the column to the right of the data, determine the average of all the mean surface salinities for each year.

2.      Graph the results.

3.      Answer the following questions:

4.      Which years had the maximum and minimum mean annual salinities?

a.      What is the range of the mean salinity at Race Rocks?

b.      Why would the mean salinity change from year to year? (Think globally!)

5.      In the bottom row, beneath the columns of data, graph the monthly mean salinity measures for each month, since 1932.

6.      Graph the results.

7.      Answer the following questions:

c.      During what months is the salinity highest?

d.      During what months is the salinity lowest?

e.      What is the range of average salinity?

f.      Describe the graph and give reasons why surface salinity changes in a predictable manner over the course of the year.

8.      Bonus question: What is the mean salinity level of Pacific Ocean water and how does it compare to the salinity at Race Rocks?

Temperature Research Page

9.      Answer the following questions:

g.      What is the maximum and minimum mean annual temperature?

h.      What is the range of mean temperatures?

i.        Why would the mean temperature change from year to year? (Think globally!)

10.  In the bottom columns, graph the monthly mean temperature measurements for the months, over all the years.

11.   Graph the results.

12.  Answer the following questions:

j.       During what months is the temperature highest?

k.      During what months is the temperature lowest?

l.        What is the range in temperature?

m.     Why would mean temperature levels change from month to month in this area?