A student completes an experiment using a potometer. She leaves the plant for 5 minutes and the air bubble moves 13 mm. Calculate the rate of water uptake/transpiration. Give the u... A student completes an experiment using a potometer. She leaves the plant for 5 minutes and the air bubble moves 13 mm. Calculate the rate of water uptake/transpiration. Give the units for your answer.
Understand the Problem
The question is asking us to calculate the rate of water uptake or transpiration using the distance the air bubble moves in a potometer over a specified time period. We will determine the rate by dividing the distance moved by the time taken and provide the appropriate units for the answer.
Answer
The rate of water uptake is $ \text{Rate} = \frac{d}{t} $ in cm/s.
Answer for screen readers
The rate of water uptake is given by the formula $ \text{Rate} = \frac{d}{t} $, and is expressed in cm/s.
Steps to Solve
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Measure the Distance First, measure the distance that the air bubble has moved in the potometer. Let's say this distance is $d$ centimeters.
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Measure the Time Period Next, find the time period over which this movement occurred. Let's denote this time as $t$ seconds.
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Calculate the Rate of Water Uptake Now, you can calculate the rate of water uptake (or transpiration) using the formula:
$$ \text{Rate} = \frac{d}{t} $$
This formula gives you the distance moved per time unit, which is the desired rate of transpiration.
- Determine the Appropriate Units Finally, ensure you express the rate in units of cm/s (centimeters per second) since we are measuring distance in centimeters and time in seconds.
The rate of water uptake is given by the formula $ \text{Rate} = \frac{d}{t} $, and is expressed in cm/s.
More Information
The rate of water uptake is crucial for understanding how plants absorb water through their roots and lose it through transpiration. This measure can help botanists and ecologists study plant health and water use efficiency.
Tips
- Miscalculating the distance or time: Always double-check your measurements.
- Forgetting to convert units: Ensure both distance and time are in proper units for calculation.
- Dividing incorrectly: Remember that the rate is distance divided by time.
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