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Gr 6 SC 2B
Gr 6 Science
| Term | Definition |
|---|---|
| crustacean | an arthropod with a hard, crusty shell |
| regeneration | the growing back of a lost body part |
| swimmerets | leglike limbs on the underside of a lobster's abdomen that help the lobster move |
| carnivore | a flesh-eater |
| herbivore | a plant-eater |
| mollusks | a group of soft-bodied invertebrates that includes clams, oysters, snails, and squids |
| gastropod | a mollusk such as a snail or slug that has a muscular foot that is used to slide forward on a layer of slime |
| univalves | one-shelled mollusks, such as a snail, conch, or cowrie |
| bivalves | mollusks with two matching shells joined by hinges, such as the mussel, oyster, clam, or scallop |
| cephalopods | a group of mollusks in which the foot and head are combined into a single headlike structure |
| protozoans | miniature invertebrates made of a single cell |
| cell | the smallest living unit in any living organism |
| cell membrane | the part of a cell that surrounds and protects the cell and determines what may enter |
| cytoplasm | the jellylike fluid that fills the volume of a cell |
| nucleus | the part of a cell, often located near the center, that directs the work of the cell |
| chromosomes | threadlike structures in a cell's nucleus that contain the instructions for running the cell and making needed parts |
| pseudopods | projections that an amoeba uses to move from place to place |
| cilia | tiny, hairlike structures that cover a paramecium and allow it to move |
| pea crab | the smallest crab, only 1/4 inch long; hides inside the shell of a live clam or oyster |
| Japanese spider crab | weighing up to 40 pounds, with 5 foot long legs |
| ghost crab | a sand-colored, burrowing crab of Atlantic and Caribbean beaches |
| king crab | an Alaskan crab popular as seafood |
| blue crab | a crab of the eastern U.S. popular as seafood |
| hermit crab | a crustacean that lives in discarded snail shells |
| American lobster | a type of lobster prized for it's enormous pincers and meaty tail; also called Maine lobster |
| spiny lobster | a lobster with no pincers that defends itself with long, sharp antennae; also called the rock lobster |
| crayfish (crawfish / crawdad) | a small freshwater lobster that feeds on small animals in small lakes, ponds, streams, or drainage creeks |
| brine shrimp | one of the smallest shrimp, has "gill-feet" used for swimming, breathing, and filtering water for food |
| pistol shrimp | has a large pincer it uses as a "stun gun" |
| cleaner shrimp | eats parasites on fish |
| barnacle | a crustacean that cements itself to an object and builds a hard shell around itself for protection |
| wood louse | a crustacean that lives on land in moist places; has seven pairs of legs |
| pill bug (roly-poly) | a type of wood louse that rolls itself into a ball when it senses danger |
| earthworm | invertebrate which burrows through the soil, swallowing it and leaving behind enriched soil |
| leech | a parasitic worm that feeds on the blood of the host animal it has attached itself to |
| tapeworm | a parasitic worm that grow inside the intestines of a host and robs it of nutrients |
| roundworm | a parasitic worm that lives in the muscles, intestines, or lymph nodes of its host and takes its nourishment from the host's blood or partially digested food |
| sea star / starfish | a spiny-skinned invertebrate with five or more rays and two rows of tube feet |
| sea urchin | an invertebrate encased in a thin, rigid shell and protected by spines; it moves on tube feet |
| sea anemone | an invertebrate with a flowerlike appearance; covered with stinging tentacles |
| coral polyp | an invertebrate that builds a limestone cup at the base of its tubelike body; most live in large colonies |
| hydra | a tiny freshwater invertebrate with tentacles around its mouth |
| jellyfish | a bowl-shaped invertebrate with stinging tentacles |
| Portuguese man-of-war | a colony of several jellyfishlike creatures living and working together |
| amoeba | a protozoan whose shape changes continually as it moves on its pseudopods; uses its pseudopods to engulf food |
| paramecium | a protozoan shaped like a slipper that moves using cilia |
| centipede | 1. one pair of legs per segment 2. is a carnivore 3. moves quickly |
| millipede | 1. has two pairs of legs per segment 2. is an herbivore 3. moves slowly |
| octopus | 1. has eight tentacles 2. has no shell 3. is usually shy |
| squid | 1. has ten tentacles 2. has an internal shell 3. is more likely to attack an enemy |
| carapace | a hard, protective single shell that shields a crustacean's soft body |
| setae | the stiff bristles on an earthworm |
| castings | soil that has passed through an earthworm's body |
| organelle | a tiny organ in a cell |
| mantle | the tissue which produces a mollusk's shell in liquid form which then hardens into the protective hard covering |
| 1. larva 2. polyp 3. medusa | stages of a jellyfish |
| "false feet" | meaning of pseudopod |
| "stomach foot" | meaning of gastropod |
| three | number of body regions which most crustaceans have |
| gills | what most crustaceans breathe with |
| mouth | the pair of legs closest to what part of the centipede is always poisonous |
| krill | small shrimplike crustaceans which are the favorite food of blue whales and other large whales |
Created by:
timberswartz05