Objective: Children will compare and contrast worms and slugs, then compare them to insects.
Note: This lesson is best taught after the lesson, Is It an Insect?
Worms and slugs are not insects. Insects have six legs, two antennae, and an exoskeleton. Worms and slugs have soft bodies, do not have arms or legs, and move by crawling. Worms crawl by stretching and contracting the strong muscles in their bodies. Slugs have a single muscular foot. The foot moves the slug in a wavelike motion, gliding along the surface. Slugs leave a trail of slime along their path to help the slug glide smoothly. Worms do not have any eyes or antennae. Slugs have eyes and two sets of tentacles. One set of tentacles is for feeling. Their eyes are at the tips of the other set of tentacles.
Worms and slugs both live in the ground. They both like moist places. Slugs can live under rocks or logs. Worms live in the soil. Worms are helpful to a garden because they eat dead and decaying plant roots and leaves. Slugs, however, are harmful in the garden because they eat plants. Worms do not have a tongue or any teeth. Slugs have a tongue-like ribbon holding hundreds of tiny teeth.
These lessons are aligned with the Common Core State Standards ("CCSS"). The CCSS provide a consistent, clear understanding of the concepts and skills children are expected to learn and guide teachers to provide their students with opportunities to gain these important skills and foundational knowledge.
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There are currently no Common Core Standards for pre-k, but these lessons are aligned as closely as possible to capture the requirements and meet the goals of Common Core Standards. However, these lessons were neither reviewed or approved by the National Governors Association Center for Best Practices or the Council of Chief State School Officers, which together are the owners and developers of the Common Core State Standards.