Middle School Life Science Teacher Guide

(PS-3850)

Features 13 core lab activities coverign the fundamental concepts of physiology, ecology, plant systems and more

Transpiration

Lab Summary

Use a weather sensor to measure the change in humidity and temperature of a small potted plant over a 24-hour period.

Theory


In this activity, students investigate transpiration in a land plant. Students use a weather sensor to record data on a plant's environmental conditions inside a closed system while they:

  • Define transpiration and explain where it occurs
  • Describe how a plant can control the rate of transpiration
  • Explain how different environmental conditions affects the rate of transpiration
  • Describe the movement of water through a plant

Method

Students gain experience conducting the following procedures:

  • Setting up the equipment and work area to measure the change in humidity and temperature Watering a small potted plant and then wrapping the pot and soil surface in aluminum foil to prevent moisture loss
  • Enclosing the potted plant and weather sensor in a sealed plastic bag
  • Measuring humidity and temperature over a 24-hour period
  • Using math skills to interpret and analyze data

Sensors / Equipment Used:

PASPORT 6-in-1 Weather Sensor

(PS-2154A)

Measures barometric pressure, relative altitude, absolute and relative humidity, dew point, and temperature. For use with PASPORT Interfaces.

The Associated Bundle:

Middle School Science Standard Sensor Bundle

(PS-2933A)

This bundle contains the probeware needed to perform all 49 lab activities in the Middle School Science through Inquiry lab manual.

Interface Required

This experiment may require software and an interface for data collection.