Activity A: Get the Gizmo ready: Trees Click Reset. Select the FOREST tab. Question: What role do trees play in the forest? Form hypothesis: Where do you think trees get the nutrients they need to grow? The sun. 2. Predict: Based on your hypothesis, how will the tree population change if ALL other organisms (deer, bears, and mushrooms) are removed from the forest? 3. Analyze: Remove ALL organisms except trees. Click Advance year a few times and select the DATA tab. Was your prediction correct? Explain what you found 4. Draw conclusions: Substances that contain carbon and are produced by living things are called organic. Examples of organic materials are sugar, blood, protein, and fat. Other materials, like water, carbon dioxide, oxygen, and ammonia, are called inorganic. Some living things, called producers, can produce the organic materials they need (like food) from inorganic matter. All other organisms are consumers; they consume organic matter since they cannot make it themselves. Do your results show you that trees are producers or consumers? Explain. M