Natural Science - Term 1 - Week 6

Ecosystems are communities of living organisms interacting with their environment. They consist of biotic factors, such as plants and animals, and abiotic factors, like water and soil. Understanding these components is crucial for studying how ecosystems function and how they are affected by changes in the environment.

Consider a pond ecosystem. The biotic factors include fish, frogs, algae, and insects. The abiotic factors include water, sunlight, temperature, and soil. When analyzing an ecosystem, it's important to categorize these factors correctly to understand the interactions within the ecosystem.

In small groups, students will create a chart that lists various ecosystems (e.g., forest, desert, ocean) and identifies at least three biotic and three abiotic factors for each. After completing the chart, groups will present their findings to the class, discussing how these factors interact within their chosen ecosystems.

Students will write a short reflection in their journals about what they learned regarding ecosystems. They should answer the following prompts: What was easy to understand? What concepts were challenging? How do biotic and abiotic factors interact in an ecosystem? This reflection will help consolidate their learning and identify areas for further study.

• Water
• Sunlight
• Fish
• Soil

Answer: Fish

Biotic factors are living components of an ecosystem, such as plants and animals.

• Trees
• Bacteria
• Temperature
• Insects

Answer: Temperature

Abiotic factors are non-living components that affect ecosystems, such as temperature and water.

Answer: An ecosystem is a community of living organisms interacting with each other and their physical environment.

This definition captures the essence of ecosystems, emphasizing the interaction between living and non-living components.

• Rainforest
• Desert
• Wetland
• Grassland

Answer: Desert

Deserts receive very little rainfall, making them distinct from other ecosystems.

Answer: Trees and deer.

Trees and deer are both living organisms that play a role in the forest ecosystem.

• Produce energy
• Consume plants
• Break down dead matter
• Compete for resources

Answer: Break down dead matter

Decomposers recycle nutrients by breaking down dead organisms, which is essential for ecosystem health.

Answer: Sunlight provides energy for photosynthesis, which is essential for plant growth and supports the entire food web.

Sunlight is a critical abiotic factor that influences the energy flow in ecosystems.