Science Explosion v4, chapter 5

Question Answer
amphibian “double life”, start in water end on land
arachnid animal that has eight legs and two body segments
arthropod “jointed foot”, most number animals on earth
bilateral symmetry animals that if divided down the middle will be the same on both sides
blubber a fatty substance to insulate from cold
cartilage a bonelike substance that is softer and more bendable than bone
cold-blooded animals that rely on the environment for warmth
crustacean sea creatures with at least five pairs of jointed legs and two pairs of antennae; they breathe through gills, and most have some sort of claw
echolocation a technique used by some animals that involves making high-frequency clicks that bounce off objects and allow the animals to judge distance based on the time it takes the sound to return
exoskeleton a hard covering that acts like a knight’s armor, protecting the arthropods body
filter feeder feeds on particles or small organisms strained out of water by circulating them through its system
free-living lives independent of other organisms
insect Animal that has head, thorax (with 3 pairs of legs) and abdomen (most have two pairs of wings)
invertebrate animal without a vertebral column
metamorphosis a life cycle process from egg to adult
mollusk typically have soft unsegmented body, a mantle (with or without shell)
molt when arthropods shed their exoskeleton and grow a new one in order to grow
nematocyst organ causing a sting
nocturnal active at night
parasite lives on or in a host
pod a group of whales traveling together
pride a group of lions living together
radial symmetry animal that has body parts that repeat around a central part
setae hairlike structures
spicule thin, glassy spines
vertebrate animal with a vertebral column
warm-blooded animals that have a consistent internal temperature regardless of the environment

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