Name: Kelly DeNu Contact Info: Date:01-Jul-13 [email protected]

Lesson Title: Rescuing the Scuba Diver! Unit #: Lesson #: Activity #: Worksheet: b Activity Title: Lesson 3 - Planning/Building 1 3 1 Worksheet Title: Build/Test/Create an Equation

Name:______

1. Build your submarine!

2. Test your submarine! Make adjustments as necessary, but remember you must meet all of the requirements in the criteria!

3. When you are satisfied with your submarine, time how long it takes the submarine to get to the bottom of the tank. Complete this task 3 times and take the average of those three trials (for accuracy). Note the amount of centimeters traveled. Use this amount to put the time in a unit rate (centimeters per second cm/s)

Trial 1 Time Trial 2 Time Trial 3 Time Average Time

4. Group Demonstration – Scuba Divers Ascending Rate:

As a class we will time how long it takes for the scuba diver to travel up to the surface. *Note the scuba diver is located at the bottom of the ocean; approximately _____ cm down.

Scuba Diver’s Ascending Unit Rate:

5. Write an equation to represent the distance (y) traveled after (x) seconds for the sub and the diver:

Submarine’s Equation Scuba Diver’s Equation

1 6. Using these two equations, create a graph that visually describes at what point the submarine will reach (cross paths) with the scuba diver. This will be your point of intersection. Be sure to label your axes and provide a title.

2 7. My prediction of where the submarine will reach the scuba diver is at point: ( , ) Which represents:

8. Double check this point by solving your system of equations algebraically:

3