7Th Grade Science Final-Spring

Front 1

chemical weathering

Back 1

the process that breaksdown rock through chemical changes

Front 2

contour interval

Back 2

the difference in elevation from one contour line to the next

Front 3

contour line

Back 3

a line on a topographic map that connects points of equal elevation

Front 4

deposition

Back 4

process in which sediment is laid down in new locations

Front 5

elevation

Back 5

height above sea level

Front 6

erosion

Back 6

the process by which water, ice, wind, or gravity moves weathered rocks

Front 7

index contour

Back 7

a heavier contour line that is labeled with the elevation

Front 8

mechanical weathering

Back 8

the process that breaks down rock through physical changes

Front 9

relief

Back 9

the difference in elevation between the highest and lowest parts of an area

Front 10

topographic map

Back 10

a map that shows the surface features of an area

Front 11

topography

Back 11

the shape of the land determined by elevation, relief, and landforms

Front 12

weathering

Back 12

chemical and physical process that breaks dowm materials on earth

Front 13

autotroph

Back 13

an organim that makes its own food

Front 14

bacteriophage

Back 14

a virus that infects bacteria

Front 15

cell

Back 15

the basic building block of living things

Front 16

eukaryote

Back 16

an organism with cells that contain nuclei and organelles

Front 17

heterotroph

Back 17

an organism that connot make its own food

Front 18

homeostasis

Back 18

the maintenance of stable internal conditions despite outside changes

Front 19

hypha

Back 19

one of many branching, thread-like tubes an the body of a fungus

Front 20

muticellular

Back 20

an organism that is made up of many cells

Front 21

organism

Back 21

a living thing

Front 22

prokaryote

Back 22

an organism whose cells lack a nucleus and organelles

Front 23

spore

Back 23

a tiny cell that is able to grow into a new organism

Front 24

taxonomy

Back 24

the scientific study of how living things are classified

Front 25

unicellular

Back 25

a type of organism that is made up of a single cell

Front 26

virus

Back 26

a small, nonliving particle that invades and then reprodeuces inside a living cell

Front 27

adaptation

Back 27

a characteristic that helps an organism survive in its environment

Front 28

anus

Back 28

the opening at the end of an organism's digestive system

Front 29

asexual reproduction

Back 29

the process by which a single organism produces a new organism identical to itself

Front 30

atrium

Back 30

an upper chamber of the heart; holds the blood as it arrives in the heart

Front 31

bilateral symmetry

Back 31

line symmetry; the quality of being divisible into two halves that are mirror images

Front 32

canine teeth

Back 32

sharply pointed teeth that stab and tear food

Front 33

carnivore

Back 33

an animal that only eats other amimals

Front 34

complete metamorphosis

Back 34

characterized by four dramatically different stages- egg, larva, pupa, and adult

Front 35

contour feather

Back 35

a large feather that helps give shape to a bird's body

Front 36

crop

Back 36

a bird's internal storage tank that allows it to store food in its body after eating it

Front 37

down feather

Back 37

short, fluffy feathersthat trap heat and keeps a bird warm

Front 38

ectotherm

Back 38

an animal whose body does not produce much internal heat

Front 39

endoskeleton

Back 39

an internal skeleton

Front 40

endotherm

Back 40

an animal whose body controls and regulates its temperature by controlling the internal heat it produces

Front 41

exoskeleton

Back 41

a waxy, waterproof outer shell

Front 42

gill

Back 42

an organism's breathing organ that removes oxygen from water

Front 43

gizzard

Back 43

a thick-walled, muscular part of a bird's stomach that squeezes and grinds partially digested food

Front 44

gradual metamorphosis

Back 44

characterized by having no dramatically different stages- egg, nymph, and adult only
(no larva or pupa stage)

Front 45

herbivore

Back 45

an animal that eats only plants

Front 46

incisor

Back 46

flat-edged teeth used to bite off and cut parts of food

Front 47

invertebrate

Back 47

an animal that does not have a backbone

Front 48

larva

Back 48

the immature form of an animal that looks very different from the adult

Front 49

mammary gland

Back 49

the organs that produce the milk which mammals feed their young

Front 50

medusa

Back 50

the cnidarian body plan characterized by an upside-down bowl shape and is adapted for a free-swimming life

Front 51

molars

Back 51

teeth that, along with premolars, grind and shred food into tiny bits

Front 52

molting

Back 52

the process of shedding and outgrown exoskeleton

Front 53

notochord

Back 53

a flexible rod that supports a chordate's back

Front 54

nymph

Back 54

a stage of gradual metamorphosis that usually resembles the adult insect

Front 55

omnivore

Back 55

an animal that eats both plants and animals

Front 56

polyp

Back 56

the cnidarian body plan characterized by a vase-like shape and is adapted for life attatched to an underwater surface

Front 57

premolars

Back 57

teeth that, along with molars, grind and shred foofood into tiny bits

Front 58

pupa

Back 58

the second stage of complete metamorphosis, in which an insect is enclosed in a protective covering and gradually changes from a larva to an adult

Front 59

radial symmetry

Back 59

the quality of having many lines of symmetry that all pass through a central point

Front 60

radula

Back 60

a flexible ribbon of teeth in mollusks

Front 61

regeneration

Back 61

the ability of an organism to regrow body parts

Front 62

sexual reproduction

Back 62

the process by which a new organism forms from the joining if two sex cells
(egg and sperm)

Front 63

species

Back 63

a group of organisms that can mate with each other and produce offspring which can also mate and reproduce

Front 64

swim bladder

Back 64

an internal gas-filled organ that helps a bony fish stabalize its body at different water depths

Front 65

ventricle

Back 65

the lower chamber of the heart, which pumps blood out to the lungs/gills and body

Front 66

vertebra

Back 66

the bones that make up the backbone of an animal

Front 67

vertebrate

Back 67

an animal that has a backbone

Front 68

water vascular system

Back 68

a system of fluid-filled tubes in an echinaderm's body