GREAT LAKES ACTIVITIES PAGE

1. NOT ALL OF THE GREAT LAKES ARE AT THE SAME ALTITUDE. LOOK AT GRAPH #2 AND TRY TO ANSWER THE FOLLOWING QUESTIONS:

A. WHICH OF THE GREAT LAKES ARE CALLED THE UPPER LAKES?

B. BY LOOKING AT THE GRAPH, BETWEEN WHICH TWO LAKES IS NIAGARA FALLS LOCATED?

C. WHICH OF THESE IS LIKELY TO BE THE HEIGHT OF NIAGARA FALLS?

A) 250 FEET B) 300 FEET C) 350 FEET D) 500 FEET

2. THERE ARE SHIPWRECKS IN ALL OF THE GREAT LAKES.

A. IN WHICH LAKE WOULD IT BE EASIEST TO FIND A WRECK?

B. WHICH OF THE GRAPHS DO YOU THINK WOULD BE BEST TO HELP YOU DECIDE?

#### 3. THE RETENTION TIME IS THE TIME IT TAKES FOR ALL THE WATER CURRENTLY IN THE LAKE TO FLOW OUT.

A. WHICH OF THE GREAT LAKES HAS THE GREATEST RETENTION TIME ? CLICK HERE TO SEE THE RETENTION TIME GRAPH

B. WHICH OF THE OTHER GRAPHS HAS INFORMATION THAT HELPS YOU SHOW WHY YOUR ANSWER IN "A" HAS THE LONGEST RETENTION TIME?

#### 4. THE GREAT LAKES ARE VERY LARGE.

A. WOULD ANY OF THE GREAT LAKES COVER YOUR STATE? WHICH ONES?

1. THE AVERAGE WATER TEMPERATURE IN LAKE SUPERIOR IS THE COLDEST OF ALL THE GREAT LAKES.

A. WHICH OF THE GRAPHS WOULD GIVE INFORMATION THAT WOULD HELP EXPLAIN THIS FACT?
B. WHICH OF THE LAKES DO YOU THINK HAS THE WARMEST AVERAGE TEMPERATURE?

2. EVEN THOUGH LAKE SUPERIOR HAS THE LARGEST RETENTION TIME, POLLUTION IS A MUCH BIGGER PROBLEM IN LAKE ERIE, WHICH ALSO EMPTIES OUT THE FASTEST. RETENTION TIME

A. WHAT OTHER FACTOR OR FACTORS WOULD CAUSE LAKE ERIE TO HAVE GREATER POLLUTION PROBLEMS?

B. DISCUSS WHICH OF THE REMAINING GREAT LAKES MIGHT RANK SECOND TO LAKE ERIE IN POLLUTION POTENTIAL AND INCLUDE MATERIAL FROM THE GRAPHS TO SUPPORT YOUR CONCLUSIONS.

3. THE GREAT LAKES ARE VERY LARGE.

A. WHICH OF THE GREAT LAKES IS THE SMALLEST IN AREA?
B. WHAT PERCENTAGE OF YOUR STATE WOULD BE COVERED BY THIS STATE?

C. HOW MANY TIMES THE AREA OF YOUR STATE WOULD IT TAKE TO COVER THE ENTIRE GREAT LAKES?