Added Directions for lab on “How old is the Atlantic Ocean”
Question 1 –

On your map find the distance in cm between point 1 on South
America and point 1 on Africa. Estimate the distance within ½ of a cm. Do the same for the Point 2 and point 3 and record your answer below.
Point 1  __________ cm
Point 2  __________ cm
Point 3  __________ cm

Calculate the average distance between South America and Africa below.

Add the distance in cm of point 1 + point 2 + point 3. Distance is ____________ cm

To find the average divide the total distance of point 1, 2, and 3 by ____________. Show all work below.

The average distance is ____________ cm.
Question 2 –

Using the map’s legend 1cm = 1,000 km convert the average distance in cm to km by multiplying 1,000 X by your average distance in cm. Show all work below.
The average distance in km between South America and Africa is _________________ km
Question 3 –

To calculate the average age of the Atlantic Ocean you must: Since the average rate that South America and Africa are moving away from each other is 2.5 cm per year you must first change the average distance in km between South America and Africa to cm. To change km to centimeters multiple the average distance in km between South America and Africa by 100,000 because there are 100,000 cm in 1 km. Show the work below:
The average distance in cm between South America and Africa is __________________________ cm

Since the average rate that South America and Africa are moving away from each other is 2.5 cm per year to calculate how old the Atlantic Ocean is you must divide 2.5 years into the average distance in cm between South America and Africa. (Average distance in cm between South America and Africa ÷ 2.5 cm per year) Show all work below.
The age of the Atlantic Ocean is _________________________________ years.
Questions:

How does the age you calculated compare to the breakup of Pangaea (which represents the beginning of the formation of the Atlantic Ocean) 200 million (200,000,000) year ago? ______________________________________________________________________________________________________________________________________________________________________________________________________

Determine the percentage of error between the actual average age of the Atlantic Ocean and the age of Atlantic Ocean you obtained in the lab.

Step one.
If your results for the average age of the Atlantic Ocean is smaller than the Average Actual age given in the lab (200,000,000yrs) than subtract the Average age given (200,000,000yrs.) from the results you obtained in question 5 which is your results for the average age of the Atlantic Ocean.
Average actual age (200,000,000 years)  age you obtained for the age of the Atlantic Ocean
If your results are larger than the actual average age of the Atlantic Ocean given then subtract your age you obtained in question number 5 which is your results for the average age of the Atlantic Ocean from the actual average age of the Atlantic Ocean (200,000,000 yrs.).
age you obtained for the age of the Atlantic  Average actual age (200,000,000 years)
The difference between the two ages is ______________________ years.

Step two.
Determine the percentage of error using this formula
% of Error = The difference between the two ages obtained in Part A x 100
Actual age of the Atlantic Ocean (200,000,000 yrs.)
Show all work below
The percentage of error between the actual age of the Atlantic Ocean and the
age you obtained is: ________________ __________________.
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