They will begin activities such as building a spider habitat, constructing a web and reading about spiders to develop the theme. Most of them are very tiny animals that help people by eating insects. Spiders are not insects as many people believe. Students will learn the physical differences between insects and arachnids in this unit. Students will also study other distinct characteristics of spiders, such as spiders' contribution to other organisms in nature.
Spiders belong to a class of animals called arachnids.
They have four pairs of segmented legs, and can grow a new leg if they lose one. Most spiders have eight eyes, and they do not have antennae or wings. A spider's body is divided into two sections, the abdomen and the cephalothorax. The legs, eyes, and mouthparts are all in the cephalothorax. Most spiders have poison glands and fangs in their jaws, which they use to inject poison into insects.