BioChemistry > GIZMOS > Gizmos_Plants_and_Snails_Lab_student.pdf (All)

Gizmos_Plants_and_Snails_Lab_student.pdf

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Student Exploration: Plants and Snails Vocabulary: aerobic respiration, bromothymol blue (BTB), carbon dioxide-oxygen cycle, indicator, interdependence, photosynthesis Prior Knowledge Questions (Do... these BEFORE using the Gizmo.) 1. What important gas do we take in when we breathe? _________________________________________________________________________ 2. Why don’t we run out of the important gases that we need to stay alive? _________________________________________________________________________ _________________________________________________________________________ Gizmo Warm-up In the Plants and Snails Gizmo, each of the test tubes contains water and a small amount of bromothymol blue (BTB). BTB is a chemical indicator. An indicator changes color when the chemicals in the water change. 1. With the lights set to on, drag a snail into one test tube and a plant into another. Press Play ( ). After 24 hours, what is the color of each tube? ___________________________________________ ___________________________________________ 2. Select Show oxygen and CO2 values. Place the O2/CO2 probe in each tube. The probe shows the levels of two gases, oxygen (O2) and carbon dioxide (CO2), in the tubes. We call these amounts the gas levels. A. When the water turns blue, which gas is most common? ______________________ B. When the water turns yellow, which gas is most common? _____________________ C. What does it tell you when the water is green? ______________________________ ___________________________________________________________________ This study source was downloaded by 100000773243632 from CourseHero.com on 03-29-2022 05:00:12 GMT -05:00 https://www.coursehero.com/file/76357709/Shreya-Kasireddy-Gizmos-Plants-and-Snails-Lab-studentpdf/ 2019 Activity A: Gases in and gases out Get the Gizmo ready:  Click Reset ( ).  Clear all of the test tubes.  Turn on Show oxygen and CO2 values. Question: What gases do plants and animals take in and what do they give off? 1. Collect data: Use the Gizmo to learn what gases plants and animals take in and give off. Try it in both light and dark. Record your results below. If you do more than five experiments, write your extra results in your notebook or on separate sheets of paper. [Show More]

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