Earth Science Word Puzzles

Print an earth science word search for any unit of the course, with its answer key and a closing question.

Name Date

Earth Science Word Search

Find every word hidden in the grid. Words go across and down.

0 of 16 words found

CRUSTCTTHVHANEI

EFIASEEMYLLTLTL

DNRPTSCAZCTEIMO

WEEAKLTMEAYATQR

FCVNAROAHRHRHRB

CLOGNINUEYNTOMI

PILAELILPODHSAT

LPUEVFCEITDQPIS

ASTAOESECXXUHRU

TEIOLALQEBTAERN

EAOGCNSUNDIKRHA

TSNMAGNITUDEEBM

AOOYNWXNELERTHI

CNAOODGORAZDGNC

ETPYTRHXFMRPTPO

This grid is wider and taller than its box. Slide it to see every letter.To drag, hold the first letter for a moment, then slide.Keyboard: Tab to the grid, arrow keys to move, Enter on the first and last letter.

CrustCRUST
LithosphereLITHOSPHERE
PlatePLATE
TectonicsTECTONICS
PangaeaPANGAEA
EarthquakeEARTHQUAKE
VolcanoVOLCANO
TsunamiTSUNAMI
EpicenterEPICENTER
MagnitudeMAGNITUDE
OrbitORBIT
RevolutionREVOLUTION
SeasonSEASON
TideTIDE
EclipseECLIPSE
EquinoxEQUINOX

16 of 24 words from the Earth Science Key Terms list.

Pick two words you found that belong together. Write how they are linked.

Start from a list

Easy: words go across and down.

More options

Show clues, not words

Word list

Large print Lower-case letters Name and date line on paper

The puzzle changes as you go. See the puzzle

Answer key: Earth Science Word Search

CRUSTCTTHVHANEI

EFIASEEMYLLTLTL

DNRPTSCAZCTEIMO

WEEAKLTMEAYATQR

FCVNAROAHRHRHRB

CLOGNINUEYNTOMI

PILAELILPODHSAT

LPUEVFCEITDQPIS

ASTAOESECXXUHRU

TEIOLALQEBTAERN

EAOGCNSUNDIKRHA

TSNMAGNITUDEEBM

AOOYNWXNELERTHI

CNAOODGORAZDGNC

ETPYTRHXFMRPTPO

CRUST, LITHOSPHERE, PLATE, TECTONICS, PANGAEA, EARTHQUAKE, VOLCANO, TSUNAMI, EPICENTER, MAGNITUDE, ORBIT, REVOLUTION, SEASON, TIDE, ECLIPSE, EQUINOX

Next step Build a puzzle from your own earth science notes Scramble the same earth science words

All 130 words

Inside the Earth 20

Asthenosphere A soft, slowly flowing zone of the mantle that the rigid plates above it ride on.
Center The middle point of the Earth, inside the solid inner core.
Compass A tool with a magnetized needle that swings to point toward magnetic north.
Continental Describes the thicker crust that makes up the land, about 30 kilometers thick on average.
Convection The very slow creep of hot mantle rock that carries heat upward and moves the plates.
Core The metal center of the Earth, mostly iron and nickel: a liquid outer part around a solid inner one.
Crust The thin, rigid outer layer of the Earth: about 5 km thick under the sea, about 30 km under land.
Dense Tightly packed and heavy for its size; the mantle is a hot layer of rock like this.
Diameter The distance straight through the middle; the Earth's is about 12,750 kilometers.
Geothermal Describes heat from inside the Earth; rock warms about 25 to 30 degrees Celsius per kilometer down.
Liquid Runny, not solid; the outer core is a layer of metal like this, about 2,200 kilometers thick.
Lithosphere Earth's stiff outer shell, the crust plus the uppermost mantle. It is broken into plates.

Show all 130 words (118 more)

Inside the Earth, continued

Magnetic field The zone of force around the Earth, made by moving liquid metal deep inside; it guides a compass.
Mantle The hot, dense layer of semi-solid rock below the crust, about 2,900 kilometers thick.
Moho The boundary between the crust and the mantle, found by a change in the speed of seismic waves.
Nickel The metal mixed with iron in the deepest part of the Earth.
Oceanic Describes the thinner crust under the sea, only about 5 kilometers thick.
Plume A column of extra-hot rock thought to rise through the mantle under Hawaii and Iceland.
Rigid Stiff and hard to bend, like the crust and the slabs of the Earth's shell.
Seismic waves Vibrations that spread through the planet after a quake or an eruption. Instruments record them.

Plate Tectonics 20

Boundary The edge where two plates meet; there are three kinds.
Collide To crash together; India did this with Asia 50 million years ago, and the Himalayas were pushed up.
Convergent The kind of plate boundary where crust is destroyed as one plate dives under another.
Divergent The kind of plate boundary where new crust is made as two plates pull apart.
Drift To move slowly; in 1912 a German scientist proposed that the continents do this.
Fault A break in rock along which the two sides have moved past each other.
Fold A bend or curve in layers of rock that were once flat.
Hot spot A small, long-lasting, very warm region under a plate; one built the chain of Hawaiian islands.
Pangaea The supercontinent whose name is Greek for all lands; it split into the continents of today.
Plate A large, rigid slab of solid rock; a dozen or more make up the Earth's outer shell.
Ridge A long underwater mountain chain where plates pull apart; the Mid-Atlantic one widens 2.5 cm a year.
Rift valley A long lowland between highlands, made where the lithosphere is being pulled apart.
San Andreas The California fault, about 1,300 km long, where the Pacific Plate grinds past North America.
Seafloor The ocean bottom. New crust forms along its ridges and creeps outward.
Spreading The slow moving apart of the ocean floor on both sides of a mid-ocean ridge as new crust forms.
Subduction The sinking of one plate beneath another and down into the mantle.
Tectonics From the Greek root for to build; the theory of how the slabs of the Earth's shell move.
Transform The kind of plate boundary where two plates slide sideways and no crust is made or lost.
Trench A long, narrow, very deep dip in the ocean floor, made where one plate sinks under another.
Wegener Alfred, 1880 to 1930, the German meteorologist who proposed in 1912 that continents move.

Earthquakes and Volcanoes 20

Active Describes a volcano that has erupted recently and could erupt again.
Aftershock An earthquake that follows an earlier one, which is called the mainshock.
Ash Fine bits of rock blown out of a volcano; high winds can carry the finest around the world.
Caldera A large hollow left when a volcano collapses after its magma chamber empties; Crater Lake fills one.
Cone The shape of many volcanoes; the simplest kind is a pile of cinders around a single vent.
Dormant Temporarily inactive; describes a volcano that is quiet for now.
Earthquake A sudden shaking of the ground, set off when strained rock slips and lets its energy go.
Epicenter The point on the ground directly above the spot where an earthquake starts.
Eruption The moment a volcano sends out lava, ash or gas.
Focus The point underground where an earthquake's rupture begins; also called the hypocenter.
Geyser A hot spring that shoots out water and steam from time to time, like Old Faithful.
Magnitude A number for the size of an earthquake; each whole step up means waves ten times as tall.
Richter Charles, who with Beno Gutenberg made a scale in 1935 for the size of California earthquakes.
Ring of Fire The belt of volcanoes and quakes, about 40,000 km long, that loops around the Pacific.
Seismograph An instrument that senses and records the shaking of the ground.
Shield A broad, low volcano built up by sheets of runny lava; Mauna Loa in Hawaii is one.
Tremor Another word for an earthquake; quake and temblor are two more.
Tsunami A series of waves set off when a huge volume of water is shoved aside; Japanese for harbor wave.
Vent The opening in the ground through which molten rock and gases escape.
Volcano A hill or mountain built around a vent where molten rock and gases come out.

Earth in Space 24

Axis The imaginary line through the poles that the Earth spins around; it leans about 23.4 degrees.
Crescent The thin curved sliver of Moon seen just before and just after the dark phase.
Daylight The natural light of the Sun, from dawn to dusk.
Eclipse When the Moon crosses the face of the Sun, or the Moon passes through the Earth's shadow.
Ellipse A slightly stretched circle; the shape of the Earth's path around the Sun.
Equinox One of two moments a year, in March and September, when the Sun is directly over the equator.
Full moon The phase when the whole face we see is lit. A lunar eclipse can only happen now.
Gibbous Describes the Moon when more than half is lit but not all; the word means bulging.
Leap year A calendar of 366 days; the added day keeps the dates in step with the seasons.
Neap The kind of tide with the smallest range, at the first and last quarter of the Moon.
New moon The phase when the side facing us is dark. A solar eclipse can only happen now.
Orbit The path of the Earth around the Sun, about 149.6 million kilometers out on average.
Phases The changing shapes of the lit part of the Moon, which repeat about every 29.5 days.
Quarter The phase when half of the Moon's face is lit; there is a first one and a last one.
Revolution One full trip of the Earth around the Sun, which takes about 365 and a quarter days.
Rotation The spin of the Earth toward the east, once in about 24 hours.
Season One of four parts of the year, caused by the Earth's tilt and not by its distance from the Sun.
Solstice One of two moments a year, in June and December, when the Sun is farthest north or south.
Sundial An instrument that shows the hour by where a shadow falls on a marked plate.
Tide The regular rise and fall of the sea, driven mostly by the Moon's pull and partly by the Sun's.
Tilt The lean of the Earth's axis, about 23.4 degrees; it is the cause of the seasons.
Umbra The darkest part of a shadow, where the light source is completely covered.
Waning Thinning; describes the Moon while its lit part shrinks from night to night.
Waxing Thickening; describes the Moon while its lit part grows from night to night.

Spheres, Maps and Branches 24

Atmosphere The blanket of air around the Earth: about 78 percent nitrogen and 21 percent oxygen.
Biosphere The living part of the planet: every place where life is found, taken together.
Contour A line on a map that joins points of equal height; lines close together mean a steep slope.
Cryosphere The frozen part of the planet: snow, glaciers, sea ice and frozen ground.
Elevation How high a place stands, most often measured from average sea level.
Exosphere The outermost layer of air, which starts about 700 km up and thins out into space.
Geology The branch that studies the Earth's structure, what it is made of and the processes that shape it.
Geosphere The solid, rocky part of the Earth, one of its four main systems.
Hydrosphere All of Earth's water: oceans, ice, rivers, groundwater and vapor. Hydro is Greek for water.
Latitude Position north or south of the equator in degrees, from 0 to 90.
Longitude Position west or east of the prime meridian, measured in degrees.
Mesosphere The third layer of air, from about 50 to 80 km up; its top is the coldest place on the planet.
Meteorology The branch that studies the atmosphere and the weather.
Nitrogen The gas that makes up about 78 percent of dry air.
Oceanography The branch that studies the ocean.
Ozone A gas that forms a layer 15 to 35 km up and absorbs most of the Sun's ultraviolet rays.
Salinity How salty a lake or sea is: a measure of the salts mixed into the water.
Sea level The average height of the ocean's surface, from which elevation is measured.
Seismology The science of quakes and the waves they send out; seismos is Greek for earthquake.
Stratosphere The second layer of air, from about 12 to 50 km up; the ozone layer is in it.
Thermosphere The fourth layer of air, from about 80 to 700 km up, where auroras glow.
Topographic Describes a map that shows the shape of the land with contour lines.
Troposphere The lowest layer of air, up to about 12 km, where most weather happens.
Volcanology The science of volcanoes and molten rock; named after Vulcan, the Roman god of fire.

Geologic Time 22

Absolute age How old a rock is in years, a number found by radiometric dating.
Billion A thousand million; the Earth is about 4.54 of these years old.
Cenozoic The era whose name means new life; it began 66 million years ago and is still going.
Cretaceous The last and longest period of the Mesozoic; it ended 66 million years ago with a mass extinction.
Eon The longest span on the geologic time scale; there have been four.
Epoch A span of geologic time shorter than a period; ours began about 11,700 years ago.
Era A span of geologic time shorter than an eon and longer than a period; ours is the Cenozoic.
Half-life The time in which 50 percent of a radioactive isotope decays; 5,730 years for carbon-14.
Holocene The epoch we live in, which began about 11,700 years ago after the last glacial period.
Ice age A long time of lower temperatures when glaciers and polar sheets of frozen water spread.
Jurassic The second of the three periods in the age of dinosaurs. It began about 201 million years ago.
Mesozoic The era whose name means middle life, when dinosaurs ruled. It ended about 66 million years ago.
Paleozoic The era whose name means old life; it began about 539 million years ago.
Period A span of geologic time that is one part of an era, such as the Jurassic.
Pleistocene The epoch of the great ice ages. It ended about 11,700 years ago.
Precambrian The earliest and longest stretch of the Earth's past, about 88 percent of its history.
Quaternary The period we live in now, which began roughly 2.6 million years back.
Radiometric Describes dating that compares a radioactive isotope with what it decays into.
Relative age How old a rock is compared with others, older or younger, with no number of years.
Superposition The law that in undisturbed layers of rock the oldest layer is at the bottom.
Triassic The first period of the Mesozoic; the first dinosaurs appeared late in it.
Unconformity A buried surface that marks a gap in the rock record, between layers of different ages.

How this list was compiled: Own work: the word list and every clue were written for this page. The facts in the clues were checked on 2026-09-19 against United States Geological Survey pages (https://pubs.usgs.gov/gip/dynamic/inside.html, https://pubs.usgs.gov/gip/geotime/age.html) and Wikipedia, among them https://en.wikipedia.org/wiki/Geologic_time_scale. Spellings follow the American Heritage Dictionary (https://www.ahdictionary.com/). Some clues were reworded on 2026-09-20, and any fact that changed was checked against Wikipedia the same day. Licence: own work

How it works

Earth science word puzzles for the whole course, each one a word search: the first grid hides 16 of 24 key terms, Crust, Tsunami, Orbit and Eclipse included. Nine lists, 130 words in all, match the units you teach.

Read the full guide

Six lists, one for each part of the course

The Start from a list row, under the puzzle, shows 9 lists. Six are units: Inside the Earth (20 words), Plate Tectonics (20), Earthquakes and Volcanoes (20), Earth in Space (24), Spheres, Maps and Branches (24) and Geologic Time (22). Teaching moon phases? Choose Earth in Space, and New puzzle draws 16 of its 24 words. Easy Earth Science keeps to the 25 words of 3 to 5 letters, such as Moho, Ash and Neap.

Rocks, minerals and erosion have pages of their own

Rock names, mineral names, the rock cycle and the words of weathering and erosion are left out. Each of those units has a puzzle of its own, listed on the science unit word searches page.

Volcanology is filed with the branches of the subject, away from Volcano, so one answer never hides inside another.
Ring of Fire becomes RINGOFFIRE in the grid, and 13 more entries drop a space or hyphen the same way.
Asthenosphere fills 13 squares: keep Hard Earth Science on a grid of 15 by 15 or more.

Questions and answers

What words are in an earth science word search?

The key terms are Crust, Mantle, Core, Plate, Fault, Earthquake, Volcano, Tsunami, Axis, Orbit, Rotation, Season, Tide and Eclipse, plus ten more such as Pangaea and Equinox. Other lists add the layers of the atmosphere, Moon phases, map terms and the geologic time scale.

Do the earth science puzzles have an answer key?

Yes. Print or save as PDF makes 2 pages on Letter or A4: the grid below a Name and Date line, the word list and a two-line writing task, then the key with every word ringed. Show answers rings them on screen as well.

How hard are the puzzles?

As hard as the list you choose. Easy Earth Science has 25 short words; Hard Earth Science has the 49 words of 9 letters or more, Asthenosphere and Superposition among them. Easy runs words across and down, Medium adds diagonals and Hard adds backwards words.

How old is the Earth?

About 4.54 billion years. In this puzzle that is the clue for Billion, in the Geologic Time list: tick Show clues, not words, in More options, and the sheet prints "A thousand million; the Earth is about 4.54 of these years old."

All 130 words

Inside the Earth 20

Inside the Earth, continued

Plate Tectonics 20

Earthquakes and Volcanoes 20

Earth in Space 24

Spheres, Maps and Branches 24

Geologic Time 22

How it works

Six lists, one for each part of the course

Rocks, minerals and erosion have pages of their own

Questions and answers

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