# The Pond Ecosystem

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The Pond Ecosystem
Name: ______kory byrd
________________________________ Date: ________________________

Student Exploration: Pond Ecosystem

Vocabulary: abiotic factor, biotic factor, concentration, 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?

_______________________from there gills__________________________________________________

2. Where does the “fizz” in soda come from? _______co2_______________________________

_________________________________________________________________________

Gizmo Warm-up
The Pond Ecosystem Gizmo™ lets you study ponds as an 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? ___32____ °C

3. Just as soda contains dissolved carbon dioxide, pond water contains dissolved oxygen. The unit 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? ______5.29_______

4. Click Play () and drag the Fishing pole to the pond. Fish for about four hours.

How many catfish did you catch? ____4_________ How many trout? ___3__________

Activity A:

A day in the life of a pond
Get the Gizmo ready:
Click Reset ().

Introduction: The fish in a pond are affected by biotic factors such as other fish, aquatic plants, insects, and bacteria. They are also affected by abiotic factors, or nonliving things such as temperature and the concentration of dissolved oxygen.

Question: How does the amount of dissolved oxygen in a pond change during one day?

1. Observe: Use the Oxygen gauge to measure the concentration of dissolved oxygen

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