Other Activities
Measuring Giant Insects
Objective: Understand the size of ancient insects and how oxygen levels affected their growth.

Materials:

• Ruler or tape measure
• Paper, markers, or printed insect outlines
• Optional: string for measuring wingspan

Instructions:

1. Show images of Carboniferous insects, like the giant dragonfly (Meganeura) with a wingspan of ~2 feet (60 cm).
2. Measure the wingspan and compare to modern insects like dragonflies or beetles.
3. Discussion: Why could insects grow so large during the Carboniferous?
   • Sample answer (Level 1): There was more oxygen in the air, so bugs could get bigger.
   • Sample answer (Level 2): Higher oxygen concentration allowed larger bodies because insects rely on diffusion through tracheae; less oxygen limits maximum size today.

• Have students calculate the ratio of ancient insect size to modern relatives.

Coal Formation Simulation
Materials:

• Layers of soil, leaves, or paper
• Plastic containers or clear jars
• Heavy books or weights

Instructions:

1. Layer leaves/paper and soil in a container to represent swampy forest layers.
2. Press down with a heavy book to simulate compression over time.
3. Talk with your child about how these layers eventually become coal over millions of years.

Talking Points:

• Level 1: “Plants get squished over a long, long time to make coal.”
• Level 2: “Peat forms first, and over millions of years, pressure and heat turn it into coal through chemical changes.”

Extension: Compare different layers—older vs. newer—and imagine what kind of plants and animals lived there. Oxygen Experiment
Materials:

• Balloons or candles
• Optional: jars for different air conditions

Instructions:

1. Inflate balloons to see how much “air” they can hold.
2. Or, light a candle in a jar and see how long it burns. Discuss how oxygen helps living things “breathe” and grow.
3. Relate it to giant insects of the Carboniferous—more oxygen allowed them to grow bigger than today’s insects.

Talking Points:

• Level 1: “When there’s more oxygen, bugs can grow bigger.”
• Level 2: “Carboniferous oxygen levels were higher, allowing insects to reach huge sizes because their tracheal system could support larger bodies.”

Extension: Compare modern insects to Carboniferous giants and discuss why we don’t see such large bugs today.

Rock and Coal Observation
Materials:

• Pieces of coal
• Fossil imprints or sedimentary rocks
• Magnifying glass (optional)

Instructions:

1. Examine coal and fossils. Look for plant imprints or patterns.
2. Discuss how these rocks formed from Carboniferous forests and swampy environments.

Talking Points:

• Level 1: “Coal comes from really old plants that got squished a long time ago.”
• Level 2: “Sedimentary rocks and coal preserve evidence of ancient forests, showing us how Earth and ecosystems changed over millions of years.”

Extension: Sketch what you see in the rocks and imagine the ancient forest that created them.