£ Conclude and Apply

1. Explain how the amount of sunlight reaching the forest floor changed.

2. Infer why it is important for leaves and branches to stop sunlight from reaching much of the forest floor.

Adult supervision required for all labs. ►

3/ Echinoderm Hold

Q Real-World Question

How do echinoderms living in intertidal ecosystems hold on to rocks?

Possible Materials ^ IC

• plastic suction cup

• paper towel or sponge

O Procedure

1. Moisten a paper towel or sponge with water.

2. Press a plastic suction cup on the moist towel or sponge until the entire bottom surface of the cup is wet.

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