| A | B | 
| joint | place where two bones meet | 
| exoskeleton | Rigid outer covering  - outside | 
| Living Environments | Air, land and water | 
| Groups of Arthropods | Crustaceans, centripedes & Millipedes, and Arachnids | 
| Examples of Crustaceans | crabs, lobsters, crayfish and shrimp | 
| Regeneration | ability to grow back lost body parts | 
| Carnivorous | meat eaters | 
| venom | inject poisons | 
| Herbivorous | plant eaters | 
| Examples of Arachnids | spiders, scorpions, ticks and mites | 
| Environment which spiders live in | on land and water | 
| Environment which scorpions live | in dry desert areas | 
| Environment which ticks and mites live | in/on plants and animals | 
| Part of the spider's body that secretes silk | Glands | 
| nocturnal | night | 
| Main characterisitics of anthropods | jointed legs and exoskeleton | 
| Insects' bodies are divided into ____ sections | Three | 
| Insects have _____ pairs of legs | Three | 
| antennae | ability to feel the environment with them | 
| Metamorphosis | a change in physical appearance as an organism goes through the stages of development | 
| Example of metamorphosis | caterpillar --> butterfly | 
| stages of metamorphosis | egg --> larva --> pupa --> adult | 
| Pheromones | chemicals given off by an insect to attract another insect | 
| Examples of social insects | ants, termites, some wasp species and bees | 
| Camouflage | blends into its environment | 
| Mantle | provides the material that makes up the shell of a mollusk | 
| univalves | one shell | 
| Radula | located in the mouth of a mollusk - file food | 
| Examples of Univalve Mollusks | garden snail & slugs | 
| bivalve | two shells | 
| Examples of Bivalve Mollusks | clams, mussels and oysters | 
| Examples of head-footed mollusks | squid, octopus and nautilus | 
| water propulsion system | force water out tubes in their bodies causing them to move quickly in the opposite direction | 
| What are the main characterisitics that all mollusks have in common? | soft, fleshy bodies | 
| echinoderms | have rough, spiny skins | 
| Examples of echinoderms | sea cucumber, sea lilies, sea urchins and sand dollars |