Examples of Mini-Ecosystems You Can Create at Home

📚 Quick Study Guide

• 🌍 Ecosystem Definition: An ecosystem is a community of living organisms (plants, animals, and microbes) interacting with each other and their physical environment.
• 🌱 Key Components: Biotic (living) and abiotic (non-living) factors. Biotic includes plants, animals, and microorganisms. Abiotic includes water, sunlight, soil, and air.
• 🐟 Aquarium Ecosystem: A closed aquatic environment containing fish, plants, and microorganisms. It demonstrates nutrient cycling and interdependence.
• 🌿 Terrarium Ecosystem: A closed terrestrial environment containing plants, soil, and sometimes small invertebrates. It demonstrates water cycling and plant growth.
• 🍄 Decomposition Column: A layered system demonstrating decomposition, nutrient cycling, and the role of decomposers like fungi and bacteria.
• ☀️ Energy Flow: Energy enters ecosystems primarily through sunlight, which is then converted into chemical energy by plants through photosynthesis ($6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$).
• 🔄 Nutrient Cycling: Nutrients like nitrogen and carbon are recycled within the ecosystem through processes like decomposition and the nitrogen cycle.

🧪 Practice Quiz

1. Which of the following is the BEST definition of an ecosystem?
   1. A collection of non-living things.
   2. A group of similar organisms.
   3. A community of living organisms interacting with each other and their environment.
   4. A single organism and its habitat.
2. What are the two main components of an ecosystem?
   1. Living organisms and climate.
   2. Biotic and abiotic factors.
   3. Plants and animals.
   4. Water and soil.
3. In an aquarium ecosystem, what is an example of a biotic factor?
   1. The gravel at the bottom.
   2. The water.
   3. The fish.
   4. The air pump.
4. What process allows plants to convert sunlight into energy?
   1. Respiration.
   2. Decomposition.
   3. Photosynthesis.
   4. Transpiration.
5. Which of the following is a PRIMARY function of decomposers in an ecosystem?
   1. Producing oxygen.
   2. Breaking down dead organic material.
   3. Providing shelter for animals.
   4. Consuming plants.
6. In a terrarium, what is the MAIN source of water for plants after the initial setup?
   1. Rainwater.
   2. Water added manually.
   3. Water vapor from the air outside.
   4. Water recycled through transpiration and condensation.
7. What is the role of fungi and bacteria in a decomposition column?
   1. To provide nutrients for plants.
   2. To break down organic matter.
   3. To produce oxygen.
   4. To consume insects.