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Gizmos Student Exploration: Pond Ecosystem Answer Key
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Gizmos Student Exploration: Pond Ecosystem Answer Key
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Name: Lee ArthurDate:
Student Exploration: Pond Ecosystem
Vocabulary: abiotic factor, algal bloom, biotic factor, concentration, eutrophication, mean,oxygen,
parts per million, photosynthesis
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
1. All animals need oxygen. We get oxygen from the air we breathe. How do fish get theirs?
Fishes get their oxygen by filtering water through their gills to get oygensince
they don’t have lungs like humans do.
2. Where does the “fizz” in soda come from? Carbon dioxide
Gizmo Warm-up
The Pond Ecosystem Gizmo™ lets you study ponds asan
ecologist would. Each of the tools can be dragged to the
pond to take measurements.
1. Drag the Thermometer to the pond at 6:00 AM.
What is the water temperature? 29 °C
2. Click Fast-forward ( ) until about 12:00 PM, and
then click Pause ( ).
What is the water temperature now? 31 °C
3. Just as soda contains dissolved carbon dioxide, pond water contains dissolved oxygen. Theunit for
measuring the concentration (amount) of oxygen is parts per million (ppm).
Drag the Oxygen gauge to the pond. What is the concentration of oxygen? 4.04ppm
4. Drag the Fishing pole to the pond, and click Play ( ). Fish for about four hours.
, How many catfish did you catch? 2 How many trout? 0
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