7Th Grade Earth Science

Front 1

siesmograph

Back 1

instroment used to measure vibrations from the earth

Front 2

siesmogram

Back 2

a tool used to measure earthquakes by using the epicenter of earthquakes

Front 3

tsunami

Back 3

a huge wave caused by an underwater earthquake

Front 4

magnitude

Back 4

how and earthquake is measured

Front 5

strike slip fault

Back 5

break in rock caused by shear forces where rocks move past eachother without too much movement

Front 6

earthquake

Back 6

vibrations or shaking, produced when rocks break along a fault

Front 7

fault

Back 7

surface along which rocks move when they reach their elastic limit

Front 8

reverse fault

Back 8

break in rock caused by compression forces where rock above the fault surface moves upward in relation to rock below the fault surface

Front 9

normal fault

Back 9

break in rock caused by tension forces where rock above the fault surface moves down in relation to rock below a fault surface

Front 10

richter scale

Back 10

invented by charles richter measures the magnitude

Front 11

epicenter

Back 11

the point drectly above the earths surface

Front 12

secondary wave

Back 12

travels through the body of the earth as series of crests troughs

Front 13

primary wave

Back 13

earthquake wave that travels through the earth 1st wave to reach a siesmograph station

Front 14

focus

Back 14

where all the waves from an earthquake start from

Front 15

surface wave

Back 15

moves in backwardssideways and sweying motion slowest but most dangerous

Front 16

vortex

Back 16

a rotating colunm of air

Front 17

hurricane

Back 17

massive rostating storms they form when warm moist air rises over tropical waters

Front 18

intensity

Back 18

the kind of damage done to an earthquake

Front 19

siesmic waves

Back 19

a wave caused by an earthquake

Front 20

forcast

Back 20

a prediction made about the weather by a meadorioigest

Front 21

tempuature

Back 21

a measuer of how hot or cold a matereal is; and indication of the amount of heat energy has been absorbed

Front 22

heat

Back 22

the state of a body perceived as having or generating a relatively high degree of warmth

Front 23

humidity

Back 23

moist damp air

Front 24

doppler radar

Back 24

a tool to see how the air is moving

Front 25

air mass

Back 25

a body of air with the same temp and moisture

Front 26

sea breese

Back 26

the flow of air from water to land

Front 27

jet stream

Back 27

strong winds in the troopsphere that travel 200 km per hour

Front 28

land breese

Back 28

the flow of air from land to water

Front 29

easterlies

Back 29

winds that flow east to west

Front 30

westerlies

Back 30

winds that flow west to east

Front 31

global winds

Back 31

winds that form between the equator and poles

Front 32

moonson

Back 32

verry powerful land and sea breeses that change direstions with the seasons

Front 33

warm front

Back 33

2 warm air meets air gradually moves up

Front 34

trade winds

Back 34

winds that flow towards the equator and turn western as they go. fromation from the earths movement

Front 35

occualed front

Back 35

when cold and cool air meet

Front 36

cold front

Back 36

when cold air meets warm air and cuases the warm air to move upward FAST!

Front 37

convection

Back 37

the transfer of heat by the circulation or movement of the heated parts of a liquid or gas

Front 38

evaporation

Back 38

when water gets absorbed into clouds

Front 39

water cycle

Back 39

the process of the the way the water moves

Front 40

condesation

Back 40

when the water from the land turns into tiny droplets of water

Front 41

precipitation

Back 41

when a form of liqud fall down from the sky

Front 42

front

Back 42

when air masses of diffrent temp pressure and humidity

Front 43

density

Back 43

the amount of matter in a given space

Front 44

greenhouse gasses

Back 44

gasses in the earths atmosphere such as water vapor and carbon dioxide that absorbs energy raided from the earth and prevent its escape

Front 45

vaccum

Back 45

a space with nothing in it

Front 46

joseph henry

Back 46

the father of forecasting

Front 47

weather

Back 47

the state of the atmosphere at a pitucular time and place

Front 48

climate

Back 48

weather conditions that have charactristic of reign or of a pitcular place over a log period of time

Front 49

atmosphere

Back 49

the thin blanket of gasses that surrounds the earth

Front 50

radiation

Back 50

the process which energy is transfered from one objectsuch as the sun to another without the space between them being heated

Front 51

solar energy

Back 51

energy from the sun

Front 52

ellipse

Back 52

an oval rottion around the sun

Front 53

equinox

Back 53

2 days of the year where the atemosphere recives the same amout to energy