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Exercise and Respiration
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Exercise and Respiration
📚 Part 1: Multiple Choice
1. What is respiration in living organisms?
The process of taking in food only
A chemical reaction in cells that releases energy
The same as photosynthesis
Movement of air in and out of the lungs
2. Which equation shows aerobic respiration?
Glucose → energy + oxygen
Glucose + oxygen → energy + carbon dioxide + water
Oxygen + carbon dioxide → glucose
Water + glucose → energy
3. In the class investigation "How does exercise affect heart and breathing rates?", which are the dependent variables? (Tick all that apply)
Heart rate (pulse)
Breathing rate (breaths per minute)
Type of exercise performed
Room temperature
4. Immediately after moderate exercise you would expect:
Heart rate decreases and breathing rate decreases
Heart rate increases and breathing rate increases
No change in heart or breathing rate
Only breathing rate changes, heart rate stays the same
✏️ Part 2: Short Answers & Vocabulary
5. Write the steps you would follow to measure someone’s pulse for 60 seconds. (Two or three short steps)
6. In one sentence, explain why heart rate increases during exercise.
7. Match the vocabulary to the correct definition. Draw lines from left to right.
a) Aerobic respiration
b) Pulse
c) Controlled variable
1) A factor kept the same in an experiment
2) The rhythmic stretching of an artery as the heart beats
3) Respiration using oxygen to release energy
8. Fill the blanks for the aerobic respiration equation:
Glucose + __________ → energy + carbon dioxide + __________
🔬 Part 3: Practical Data & Analysis
9. Record sample measurements (use your own results in the practical):
Resting heart rate: ____ bpm
Heart rate after 2 minutes of exercise: ____ bpm
Resting breaths per minute: ____
Breaths per minute after exercise: ____
10. Sketch a quick bar chart showing resting and post-exercise heart rate. Label the vertical axis "Heart rate (bpm)" and the horizontal axis "Before / After".
11. Exit ticket: Suggest one improvement to make the investigation more reliable.
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