Name: _____amelia hernandez______________ Date: 4/9/20Student Exploration: Plants and SnailsVocabulary: aerobic respiration, bromothymol blue (BTB), carbon dioxide-oxygen cycle,indicator, interdependence, photosynthesisPrior Knowledge Questions (Do these BEFORE using the Gizmo.)1. What important gas do we take in when we breathe?__________________________oxygen____________________________________2
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Name: _____amelia hernandez______________ Date: 4/9/20
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?
__________________________oxygen____________________________________
2. Why don’t we run out of the important gases that we need to stay alive?
_________________photosynethesis__________________________________________
_________________________________________________
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?
___________________________________________
Test A turned yellow. Test B turned blue.
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? ____Oxygen________
B. When the water turns yellow, which gas is most common? ___Carbon_________
C. What does it tell you when the water is green? Theres an even amount of carbon
dioxide and
oxygen_____________________________________________________________
______
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