Chapter 5: Earth's Structure

Front 1

density

Back 1

amount of mass, or substance, in a material

Front 2

geosphere

Back 2

solid part of Earth, including the soil and Earth's rocky center

Front 3

gravity

Back 3

force of attraction between every object and every other object that exists because of mass

Front 4

sphere

Back 4

a shape like a ball

Front 5

geosphere

Back 5

includes soil, sediments, and rocks

Front 6

atmosphere

Back 6

a mixture of many gases

Front 7

sphere

Back 7

general shape of the earth

Front 8

biosphere

Back 8

you are a part of this

Front 9

hydrosphere

Back 9

all water on earth

Front 10

gravity

Back 10

force responsible for Earth's formation and shape

Front 11

density

Back 11

property that affected the formation of Earth's layers

Front 12

diameter

Back 12

Earth's is almost 13,000 km

Front 13

solar nebula

Back 13

the solar system formed from it

Front 14

outer layer

Back 14

the least dense part of the geosphere

Front 15

asthenosphere

Back 15

plastic, flowing, layer within the mantle

Front 16

core

Back 16

Earth's dense, metallic center

Front 17

crust

Back 17

rocky, outermost layer of the Earth

Front 18

lithosphere

Back 18

rigid layer that includes the crust and uppermost mantle

Front 19

magnetosphere

Back 19

outer part of Earth's magnetic field

Front 20

mantle

Back 20

thick middle layer in the solid part of the Earth

Front 21

nickel

Back 21

specific type of metal

Front 22

observation

Back 22

act of recognizing and noting a fact or occurrence

Front 23

inner core

Back 23

made of iron crystals

Front 24

crust

Back 24

the thinnest layer of the earth

Front 25

lithosphere

Back 25

includes the crust and rigid, upper mantle

Front 26

asthenosphere

Back 26

flows like a soft plastic

Front 27

outer core

Back 27

made of liquid metal

Front 28

mantle

Back 28

the thickest layer of Earth

Front 29

False

Back 29

True or False: Pressure and temperature decrease with depth below Earth's surface.

Front 30

True

Back 30

True or False: A compass needle points north because of Earth's magnetosphere.

Front 31

True

Back 31

True or False: By studying earthquake waves, scientists have discovered that Earth's core has two parts.

Front 32

True

Back 32

True or False: Earth's geomagnetism protects the planet from dangerous cosmic rays and charged particles from the Sun.

Front 33

feature

Back 33

structure, form, or appearance of something

Front 34

landform

Back 34

feature on Earth's surface formed by natural processes

Front 35

mountain

Back 35

tall, steep landform with high relief and elevation

Front 36

plain

Back 36

low, flat landform with low relief and elevation

Front 37

plateau

Back 37

high, flat landform with low relief and high elevation

Front 38

landform

Back 38

any topographic feature of Earth's crust

Front 39

relief

Back 39

change in elevation

Front 40

mountains

Back 40

Himalayas and Appalachians are examples of what?

Front 41

elevation

Back 41

the height above sea level

Front 42

oceans

Back 42

More than 70% of the Earth's surface is covered by?