\begin{tabular}{|l|l|l|}
\hline
Temperature ([tex]$^{\circ}C$[/tex]) & Sweat Production (ml) & Urine Production (ml) \\
\hline
10 & 28 & 70 \\
\hline
15 & 45 & 60 \\
\hline
20 & 70 & 47 \\
\hline
25 & 115 & 35 \\
\hline
30 & 190 & 21 \\
\hline
35 & & \\
\hline
\end{tabular}

1. Plot a line graph of these results.
2. Describe the relationship between sweat production and urine production with an increase in temperature.
3. Explain the significance of this relationship.
4. Use your graph to predict the rate of sweat production and urine production at [tex]$40^{\circ} C$[/tex].
5. If you were to do this experiment, state the variables that you would control to achieve an accurate result.
6. How could you improve the experiment?



Answer :

To tackle this problem, let's break down the tasks step by step.

### Step 1: Tabulate the Data

The data provided in the table can be summarized as follows:

| Temperature (°C) | Sweat Production (unit) | Urine Production (unit) |
|------------------|-------------------------|-------------------------|
| 10 | 28 | 70 |
| 15 | 45 | 60 |
| 20 | 70 | 47 |
| 25 | 115 | 35 |
| 30 | 190 | 21 |
| 35 | | |

### Step 2: Interpolate Missing Values

The values for temperature 35°C and 40°C are missing in the given data set. We can use linear interpolation to estimate these values.

#### Step 2.1: Estimate for 35 °C
To find sweat and urine production at 35°C, we can observe the trend from previous recorded values and use linear interpolation.

For sweat production:
- At 30°C, sweat production is 190 units.
- Let's assume the trend continues, and at higher temperatures, sweat production increases.
- We can estimate the sweat production at 35°C using a linear trend (or through more exact methods using nearby points).

For urine production:
- At 30°C, urine production is 21 units.
- Let's assume the trend continues, and at higher temperatures, urine production decreases.
- Similarly, we can estimate urine production at 35°C using a linear trend.

#### Step 2.2: Estimate for 40 °C
Similarly, we interpolate between 35°C and the next logical increment of 5°C to estimate values at 40°C.

### Step 3: Plot the Data

Using interpolation (the exact interpolated values can be confirmed using a tool or exact calculations):

| Temperature (°C) | Sweat Production (unit) | Urine Production (unit) |
|------------------|-------------------------|-------------------------|
| 10 | 28 | 70 |
| 15 | 45 | 60 |
| 20 | 70 | 47 |
| 25 | 115 | 35 |
| 30 | 190 | 21 |
| 35 | ~250 | ~10 |
| 40 | ~320 | ~5 |

Next, plot these values using a line graph.

### Step 4: Describe the Relationship

By observing and plotting the data on a graph, we can describe the relationship between sweat and urine production:

- Sweat Production: Increases with temperature. The relationship appears to be nonlinear; as temperature rises, sweat production dramatically increases.
- Urine Production: Decreases with temperature. The relationship also seems nonlinear; urine production significantly drops as the temperature increases.

This relationship suggests a physiological response to temperature where the body sweats more to cool down and conserves water, leading to reduced urine production.

### Step 5: Predictions

At 40°C:
- Sweat Production: Approximately 320 units.
- Urine Production: Approximately 5 units.

### Step 6: Variables to Control

To achieve accurate results in such an experiment, control the following variables:
- Humidity: Ensure constant humidity levels throughout the experiment.
- Hydration: Ensure all participants are equally hydrated.
- Physical Activity: Control for physical activity levels, as activity affects sweat and urine production.
- Measurement Methods: Use consistent and precise methods for measuring sweat and urine.

### Step 7: Improving the Experiment

To improve the experiment:
- Larger Sample Size: Use more participants to increase result reliability.
- Controlled Environment: Conduct the experiment in a controlled environment to account for external variables.
- Additional Variables: Control additional variables like food intake and clothing that can influence the results.

By following these steps, you can accurately analyze the relationship between temperature and sweat/urine production and predict values at unmeasured temperatures.