6Th Grade Science, Chapter 7

Front 1

animal that at some time in its development has a notochord, a nerve cord, and gill slits

Back 1

chordate

Front 2

cold-blooded animal whose body temperature changes with the temperature of its surrounding environment

Back 2

ectotherm

Front 3

warm-blooded animal whose body temperature does not change with its surrounding environment

Back 3

endotherm

Front 4

tough, flexible tissue similar to bone but is softer and less brittle

Back 4

cartilage

Front 5

period of cold weather inactivity; in amphibians, involves burying themselves in mud or leaves

Back 5

hibernation

Front 6

period of hot, dry weather inactivity; in amphibians, involves moving to cooler, more humid areas underground

Back 6

estivation

Front 7

behavioral adaptation of reptiles that allows them to reproduce on land; encloses the embryo within a moist environment protected by a leathery shell and has a yolk that supplies the embryo with food

Back 7

amniotic egg

Front 8

strong, lightweight feather that gives a bird its shape and coloring and can help the bird steer, attract a mate, and avoid predators

Back 8

contour feather

Front 9

fluffy feather that traps and keeps air warm against a bird’s body

Back 9

down feather

Front 10

plant-eating mammal with incisors specialized to cut vegetation and large, flat molars to grind it

Back 10

herbivore

Front 11

meat-eating animal with sharp canine teeth specialized to rip and tear flesh

Back 11

carnivore

Front 12

plant-eating and meat-eating animals with incisors specialized to cut vegetables, premolars to chew meat, and molars to grind food

Back 12

omnivore

Front 13

mammal that lays eggs with tough, leathery shells instead of giving birth to live young

Back 13

monotreme

Front 14

mammal that gives birth to incompletely developed young that finish developing in their mother’s pouch

Back 14

marsupial

Front 15

mammal whose young develops inside the female uterus until it is fully formed and ready to be born; has a placenta – a saclike organ – which supplies the embryo with food and oxygen and removes wastes

Back 15

placental