There are 6,000 kinds of earthworms. They dig in many types of soil. Some tunnels are near the ground’s surface. But earthworms often dig deeper tunnels in winter. They hide underground to stay warm. Their tunnels can be more than 6 feet (1.8 m) deep. When the weather gets warmer, earthworms are more likely to come above ground.
Most earthworms are just a few inches long. But some are much larger. The giant Gippsland earthworm is thought to be the biggest kind of worm in the world. Giant Gippsland earthworms live in a small area in Australia. They can grow to be 6.5 feet (2.0 m) long. And their bodies can be 1.6 inches (4.1 cm) wide!
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Have you ever seen an earthworm? Where was it?
What books have you read about other invertebrates? How are those animals similar to earthworms? How are they different?
Earthworms live on every continent but Antarctica. Why would it be hard for these worms to survive in Antarctica?
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