1. Mollusk Gill Gastropod Herbivore Open Circulatory System
An invertebrate with a soft unsegmented body often protected by a hard outer shell
Open Circulatory System
Circulatory system in which the heart pumps blood into open spaces in the body
Gill
An organ that removes oxygen from water
Gastropod
A mollusk with a single shell or no shell
Herbivore
A consumer that eats only plants

2. Carnivore Radula Bivalve Omnivore Cephalopod
A consumer that eats only animals
Radula
A flexible ribbon of tiny teeth in mollusks
Bivalve
A mollusk that has two shells held together by hinges and strong muscles
Omnivore
A consumer that eats both plants and animals
Cephalopod
An ocean dwelling mollusk whose foot has adapted as tentacles that surround its mouth

3. Arthropod Exoskeleton Molting Antenna Crustacean
An invertebrate that has an external skeleton, a segmented body and jointed appendages
Exoskeleton
A waxy, waterproof outer shell or skeleton that protects an animal and prevents evaporation of water
Molting
The process of shedding an outgrown exoskeleton
Antenna
An appendage on the head of an arthropod that contains sense organs
Crustacean
An arthropod that has two or three body sections, five or more pairs of legs and two pairs of antennae

4. Arachnid Abdomen Insect Thorax Metamorphosis
A process in which an animal’s body undergoes dramatic changes in form during its life cycle
Arachnid
An arthropod with two body sections, four pair of legs and no antennae
Abdomen
The hind section of an arthropod’s body that contains its reproductive organs and digestive tract
Insect
An arthropod with three body sections, six legs, one pair of antennae and one or two pair of wings
Thorax
An arthropod’s midsection, to which its wings and legs are attached

5. Pupa Nymph Food Chain Complete Metamorphosis Gradual Metamorphosis
Type of metamorphosis characterized by four dramatically different stages
Pupa
The third stage of complete metamorphosis in which an insect changes from larva to adult
Gradual Metamorphosis
Type of metamorphosis where an egg hatches into a nymph that resembles an adult
Nymph
Stage of gradual metamorphosis that usually resembles and adult insect
Food Chain
A series of events in which one organism eats another and obtains energy

6. Ecology Producer Consumer Decomposer Pollinator
The study of how organisms interact with their environment
Producer
An organism that makes its own food
Consumer
An organism that obtains its energy by feeding on other organisms
Decomposer
An organism that breaks down chemicals from wastes and dead organisms returning material to the soil and water
Pollinator
An animal that carries pollen from one plant to another of the same species, allowing it to reproduce

7. Pesticide Biological Control Echinoderm Endoskeleton
A chemical designed to kill a pest animal
Biological Control
A natural predator or disease used to control a pest insect
A radially symmetrical invertebrate that lives on the ocean floor, has an internal skeleton and a water vascular system
Echinoderm
Endoskeleton
An internal skeleton
Water Vascular System
A system of fluid filled tubes in an echinoderm’s body

8. Tube Feet
Part of an echinoderm’s water vascular system that stick out from the body and provides movement