Science Notes

               Our Creepy Crawly World


Arthropods
There are 4 types of arthropods: insects, arachnids, crustaceans, and millipedes and centipedes. All arthropods have an exoskeleton and jointed feet. 

Types of crustaceans:  crabs, lobsters, crafish, and shrimp. Crustaceans are not insects. They have 10 legs and two body parts. 
Most live in water.

Insects: They have three body parts: the head, the abdomen, and the thorax. They also have six legs.  That means spiders are not insects. Insects have antennae that can touch, smell, and taste. Some insects have wings and some change as they grow. This is called metamorphosis. Butterflies and lady bugs go through metamorphosis and have four growth stages: egg, larva, pupa, and adult.

Worms are not arthropods because they don't have legs.

Spiders are not insects. They belong to the arachnid family. They have eight legs, a head, and a body.

Some insects are social. That means they work together all the time. Two examples are bees and ants. When a bee finds a flower it will fly back to the hive to tell all the other bees.