The Living World: Senior Cycle Biology · 5th Year

Active learning ideas

Ecosystems and Biotic/Abiotic Factors

Active learning works for ecosystems because students need to see energy and matter in motion rather than memorizing definitions. When they model food webs and energy pyramids with their hands and minds, the abstract concept of trophic levels becomes visible and memorable. This approach also builds collaboration and critical thinking as students negotiate roles and relationships in an ecosystem.

• NCCA Curriculum Specifications
• NCCA: Senior Cycle - Ecology
• NCCA: Senior Cycle - The Study of Life

• 40–45 min
• Pairs → Whole Class
• 3 activities

Activity 01

• Simulation Game
• 40 min · Whole Class

Simulation Game: The Energy Pyramid Game

Students use tokens to represent energy units. They pass tokens from 'producers' to 'consumers,' with 90% being 'lost' (put in a bin) at each step to demonstrate why top predators are rare.

Differentiate between biotic and abiotic factors and their interactions within an ecosystem.

Facilitation Tip

During The Energy Pyramid Game, walk around with a stopwatch and call out time intervals so students experience how quickly energy units disappear at each trophic level.

What to look for

Provide students with a list of items found in a local park (e.g., oak tree, squirrel, rock, stream, sunlight, earthworm, fallen leaves). Ask them to categorize each item as biotic or abiotic and briefly explain their reasoning for two items.

• Apply
• Analyze
• Evaluate
• Create
• Social Awareness
• Decision-Making

Activity 02

• Inquiry Circle
• 45 min · Small Groups

Inquiry Circle: Food Web Construction

Groups are given cards representing organisms from a specific Irish ecosystem (e.g., a rocky shore or a woodland). They must build a complex food web and then predict what happens if one species is removed.

Explain how abiotic factors like temperature and light influence the distribution of organisms.

Facilitation Tip

When students build food webs collaboratively, give each group a different ecosystem card (e.g., bog, hedgerow) to ensure varied examples and peer teaching.

What to look for

Pose the question: 'Imagine a prolonged drought in an Irish woodland. Which abiotic factors would be most immediately affected, and how would these changes impact the biotic components, such as insects and birds?' Facilitate a class discussion where students share their predictions.

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Activity 03

• Gallery Walk
• 40 min · Small Groups

Gallery Walk: Nutrient Cycle Posters

Students create detailed posters of the Carbon and Nitrogen cycles. They then move around the room to identify where bacteria, plants, and animals play their roles in each cycle.

Analyze the interdependence of living and non-living components in a local ecosystem.

Facilitation Tip

Before the Gallery Walk of nutrient cycle posters, assign each student one role (e.g., decomposer, producer) to ensure all parts of the cycle are represented.

What to look for

Ask students to write down one biotic factor and one abiotic factor from a specific Irish ecosystem (e.g., a salt marsh in Wexford). Then, have them describe one way these two factors interact and influence each other.

• Understand
• Apply
• Analyze
• Create
• Relationship Skills
• Social Awareness

A few notes on teaching this unit

Start with a local context, like Irish hedgerows or bogs, to ground abstract ideas in familiar places. Avoid long lectures about energy flow; instead, use analogies like a ‘one-way street’ for energy and a ‘roundabout’ for nutrients. Research shows students grasp energy loss better when they physically manipulate materials (e.g., counters or cards) to simulate energy transfer. Always connect back to biodiversity and human impact to emphasize relevance.

Successful learning looks like students confidently explaining why energy decreases up the food chain and tracing nutrient cycles through producers, consumers, and decomposers. They should use terms like trophic levels, energy loss, and nutrient recycling accurately, and connect these ideas to real local ecosystems like Irish woodlands or salt marshes.

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Watch Out for These Misconceptions

• During The Energy Pyramid Game, watch for students who treat decomposers as optional or ‘clean-up crew’ rather than essential recyclers.

  Pause the game after each round and ask, ‘What happens to the energy in the fallen oak leaves if we remove the decomposers?’ Use a spotlight on the earthworm or fungus cards to reinforce their role in restarting the cycle.

• During the Food Web Construction activity, watch for students who claim nutrients are ‘recycled back up the food chain’ in the same way as energy.

  After groups finish their webs, draw a simple diagram on the board showing a ‘one-way street’ for energy with heat arrows escaping, and a ‘roundabout’ for nutrients cycling back to producers. Ask each group to add arrows to their web to show only energy flow direction.

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Methods used in this brief

• Simulation Game
• Inquiry Circle
• Gallery Walk