Question

Observing, Collecting Data and Thinking.
Go to Lesson Introduction 1.03 Scientific Processes 1;




The beating heart of a Daphnia can be observed under a microscope. The heart is the small, clear pouch that is beating within the organism in the video. Click Play and count the number of heart beats of the Daphnia for 20 seconds. Now check your heart beats for 20 seconds. How does the Daphnia's heart rate compare to yours? Do three trials of each.



Above is just an image: You need to go into the course to watch the video of Daphnia.
The heart is the small, clear pouch that is beating within the organism in the video. Click Play and
count the number of heart beats of the Daphnia for 20 seconds. Repeat your count 3 times and then find average. That means add all three trials together and divide by 3.
Check your heart beats for 20 seconds. Repeat your heartbeat count 3 times and then find the average. That means add all three trials together and divide by 3.
Put your data into the data table in the "Show your Work" area.
How does the Daphnia's heart rate compare to yours?
Hint: Use your phone timer to keep track of 20 seconds.


Fill in the table under show your work with your collected da

Answer 1

It looks like you're conducting an experiment to compare the heart rate of a Daphnia with your own heart rate. I can help you set up a template for collecting and calculating your data based on what you described.

### Data Table

| Trial | Daphnia Heart Rate (beats in 20 seconds) | Your Heart Rate (beats in 20 seconds) |
|--------|-------------------------------------------|---------------------------------------|
| 1 | | |
| 2 | | |
| 3 | | |
| **Average** | | |

### Steps to Fill in the Table:

1. **Daphnia Heart Rate:**
- Watch the video of the Daphnia beating its heart.
- Count how many times the heart beats for 20 seconds.
- Record the beat counts in the table under "Daphnia Heart Rate" for each of the three trials.

2. **Your Heart Rate:**
- Count your own heartbeats for 20 seconds.
- Record your heart counts in the table under "Your Heart Rate" for each of the three trials.

3. **Calculate Averages:**
- For both Daphnia and yourself, add the counts from the three trials and divide by 3 to find the average heart rate.

### Example Calculation:
If your counts were:
- **Trial 1:** 15 beats
- **Trial 2:** 14 beats
- **Trial 3:** 16 beats

Your average heart rate would be calculated as:
(15 + 14 + 16) / 3 = 15 beats

### After Completing the Data Table:
Once you fill out the table with your collected data, you can compare:

- Determine if the Daphnia's heart rate is higher or lower than yours based on the calculated averages.
- State your findings, such as "The Daphnia's heart rate is [higher/lower] than my heart rate, with averages of [Daphnia's average] and [your average], respectively."

Feel free to fill in the data based on your observations!