1. Lesson Fifteen Factors That Affect Heart Rate
Objectives
Measure resting heart rate by feeling the pulse
Determine the effect of exercise and weight on heart rate
Bellwork
Read Introduction and “Blue” reading on p
Define resting heart rate and pulse.
(Solicit ideas about what might affect heart rate.)

2. Question Hypothesis Materials
Getting Started (call on students to share answers)
Measure your heart rate for 1 min. (Ask for answers)
Is there a short cut to find “beats per minute” ?
How could we find the average resting heart rate of the class?
Question
What affect does exercise/ weight have on heart rate? (pick one)
Hypothesis
If I ___________ then my heart rate will _______ because ________________
Gallon water containers (anything that add weight), stopwatch, rulers
Materials

3. Procedure Work as a group to design an experiment Design a data table
Inquiry 15.1 p.133 (Can use student sheet 15.1, part1)
Work as a group to design an experiment
Design a data table
Get it approved by the teacher
(This could be day one)

4. Results/data Conclusion Next question
Complete your experiment and record in your data table
Graph of group heart rates (use student sheet or graph paper)
Complete Part 2 of SS 15.1
Conclusion
Answer your question using your data and restate your hypothesis.
Next question

5. Homework Other homework ideas
Answer reflection questions 4-6 in SG p 133 ( you must go over class data to make sure both weight and exercise are discussed)
Read - Blood: Life’s Liquid p 134 in SG (The only place parts of blood, blood types and lymphatic system are discussed. Consider a foldable or graphic organizer to get notes.)
Extensions 1 (animal rates) & 4 (hemophilia)
Research blood diseases and conditions
Blood types
Other homework ideas

6. Vocabulary Resting heart rate Pulse Red blood cells Platelets
White blood cells Plasma
(Pass out study guide for the written assessment which occurs as part of lesson 17. The study guide is student sheet 16.1 on p 189 of the TM.