Defining: Rate

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Rate Contests

Heart Rate (6 people) Assign a time keeper.

2. What was your active heart rate?

1. What was your resting heart rate?

Procedure: Time keeper rimes for six seconds as students count heart beats. Multiply the number of beats by 10 to get beats per minute (60 seconds). Next do jumping jacks or running in place for 1 minute, stop, find pulse. Repeat timing and counting.

Bubble Gum Blowing Blow as many bubbles as possible in two minutes (4 people) Assign a counter, a timer, a blower, and a scribe *Rotate roles so each team member has a turn to blow bubbles

4. About how many bubbles would you expect to have blown if the contest had continued for 10 minutes. Explain how you decide that number.

3. Explain how you know which team won by using their rate per second rather their total number of bubbles.

2. Find your Blower's rate of bubbles per second

1. Write a ratio comparing the number of bubles and the number of seconds in 2 minutes.

Ball Bouncing contest Bounce a ball and catch it waist for 20 seconds (4 people) *Rotate roles so each team member has a turn to bounce and catch for 20 seconds

2. If you had continues bouncing and catching for a minute at the same rate, how many bounces caught would you have? Write your rate per minute. Wxplain how you came up with that rate per minute.

1.Write the ratio of bounces caught in 20 seconds for each person on your team. Find each person's rate per second.

Soda Guzzling Guzzlers will guzzle for 30 seconds. Assign 2 guzzlers, 2 porrers, a timer, a scribe (6people) *Rotate roles

2. If a 2 liter soda bottle contains approximately 67 ounces, how long would it take each guzzler to drink the entire bottle at their rate? Show all your reasoning.

1. Write a ratio for each guzzler using ounces to 30 seconds. Find Each guzzler's rate per second.

Procedure: Two class members will guzzle. Two other class members will pour to keep a few three ounce Dixie cups about 2/3 full on a table.

High Jumper (6 people) Assign 2 sighters and a recorder.

2. Write the ratio and find the rate for the others in our group. Compare rates to determine who can jump the highest for their height.

1. Find the rate for centimeters jumped per inch of your height.

Procedure: Measure your height in centimeters. Tape a couple of meter sticks to a wall beginning at 100 centimeters up, so they extend upward well above reach. You will need a recorder and 2 sighters. Each person begins at a stand still and jumps as high as possible touching the meter stick. Jumpers may crouch, but may not run for momentum. The sighters use a pointer or another meter stick to mark the touch spot and say how many centimeters high that was, and the recorder writes the ratio of height jumped to height of jumper.