Earth Sciences Word Search Puzzles

Earth Sciences Word Searches

All items below are categorized by their difficulty level and target audience so you can pick the perfect level of fun and education. We put them in alphabetical order and show the words hidden in the grid so you can quickly page through the list and find one that meets your needs. The words can be in several directions or only forward and down if you need something for the youngsters.

To view or print a Earth Sciences word search puzzle click on its title. Once you've clicked a title you see a link to separate answer grid page with hints for the teachers that show where the words start. Our most important instruction is that we want you to be sure to have fun while you learn!!!

Title	Instructions / Description	Puzzle Words	Difficulty	Word Direction
Groundwater	Help us make the invisible visible.	AGRICULTURE, CLIMATE CHANGE, DROUGHT, EARTH, FRESHWATER, GROUNDWATER, HUMAN, INVISIBLE, OVERUSE, PLANET, POLLUTED, PROTECT, SOIL, VISIBLE, WETLANDS	Big	Forward, Backward, Diagonal
Heating Earth		COLD, DATA, EARTH, ENERGY, EXPERIMENT, GRAPH, HEAT, HEAT SINK, HYPOTHESIS, INTENSITY, LIGHT, MATERIALS, PROCEDURE, REFLECTED, SOIL, SOLAR ENERGY, SUN, TEMPERATURE, THERMOMETER, TRANSFER, WARM, WATER	Big	Forward, Backward, Diagonal
History of the Earth		AMBER, AMMONOID, ANATOMY, BRACHIOPOD, CAMBRIAN, CAST, CHARLES DARWIN, COMPARATIVE EMBRYOLOGY, CONGLOMERATE, CRETACEOUS, DINOSAUR, EARTH, ERA, EVOLUTION, FINCHES, FOSSILS, GALAPOGAS ISLANDS, GEOLOGICAL TIMESCALE, HISTORY, IGNEOUS, IMPRINT, JURASSIC, MESOZOIC, METAMORPHIC, MOULD, NATURAL SELECTION, PALAENTOLOGICAL, PALAEZOIC, PERMIAN, PRECAMBRIAN, PRESERVING, ROCKS, SANDSTONE, SEDAMENTARY, SURVIVAL OF THE FITTEST, THEORY, TRACE, TRILOBITE, VARIATIONS, WORM TRACK	Hard	Forward, Backward, Diagonal
How Ecosystem Change		ALGAE, BARE ROCK, CLIMAX SPECIES, COMMUNITY, DISPERSION, ECOLOGICAL SUCCESSION, FIFTY YEARS, FOREST, FUNGI, HARDWOOD TREE, LARGE SHRUBS, LIMITING FACTORS, PIONEER SPECIES, PRIMARY SUCCESSION, SECONDARY SUCCESSION, SMALL TREES, SOIL, TOLERANCE	Big	Forward, Backward, Diagonal
Hydro Power		DAM, GENERATOR, HYDRO, POWER, RENEWABLE, TIDAL, TRANSMISSION, TURBINE	Big	Forward, Backward, Diagonal
Ice Crystals		AIR, ALIGNMENT, APPROACHING, ATOM, AXIS, BLUE, CHANGE, CIRRUS, CLEAR, CLOUD, COLUMN, CONDITION, CRYSTAL, DENDRITIC, DEPOSITION, DEVELOP, DIAMOND, DIFFERENTIAL, DIRECT, DUST, EDIT, FALL, FOG, FORM, FREEZE, FRONT, FROZEN, GEOMETRY, GROWTH, HEXAGONAL, HIGH, HUMIDITY, HYDROGEN, ICE, LEVEL, MIGRATE, MOLECULE, NUMEROUS, PATTERN, PLATE, SCANNING, SHAPE, SIGN, SKY, SOLID, SYMMETRIC, TEMPERATURE, VISIBLE, WATER, WEATHER	Big	Forward, Backward, Diagonal
Icebergs		ANTARCTIC, AREA, BELGIUM, BROKEN, BUBBLE, CALVE, CHUNK, ESTABLISHED, FLOATING, FREELY, FRESHWATER, GLACIALLY, GLACIER, GREENLAND, GROWLER, HAZARD, HISTORY, ICEBERG, ILLUSTRATE, INTERNATIONAL, ISLAND, KILOMETRE, LARGE, MEASURING, NAMED, NOVEMBER, OCEAN, OPEN, PACIFIC, PART, PATROL, PIECE, RECORD, SEA, SHAPE, SHELF, SHELVE, SIZE, SMALL, SOUTH, SPAWNED, SQUARE, STABILITY, SURFACE, TABLE, TABULAR, TIP, TOP, WATER, WEST	Very Difficult	Forward, Backward, Diagonal
Icebergs		ANTARCTIC, AREA, BROKEN, BUBBLE, CALVE, COLOR, DISINTEGRATING, EXPRESSION, FLOATING, FRESHWATER, GLACIALLY, GLACIER, GREENLAND, GROWLER, HAZARD, HISTORY, ICEBERG, ILLUSTRATE, INTERNATIONAL, ISLAND, KILOMETRE, LED, LOSS, MEASURING, NAMED, OCEAN, OPEN, OVERVIEW, PACIFIC, PATROL, PIECE, PROCEDURE, RECORD, ROSS, SCOTT, SHAPE, SHELF, SHELVE, SIGHTED, SIZE, SMALL, SOUTH, SPAWNED, SQUARE, STABILITY, SURFACE, TABLE, TABULAR, WATER, WEST	Very Difficult	Forward, Backward, Diagonal
Icebergs		ANTARCTIC, AREA, BIG, BIT, BROKEN, CALVE, FLOATING, FRESHWATER, GLACIALLY, GLACIER, GREENLAND, GROWLER, HAZARD, HISTORY, ICE, ICEBERG, INTERNATIONAL, ISLAND, KILOMETRE, LARGE, LED, LOSS, MARITIME, NAMED, OCEAN, OPEN, OVERVIEW, PACIFIC, PART, PATROL, PIECE, RECORD, ROSS, SCOTT, SEA, SHAPE, SHELF, SHELVE, SIZE, SMALL, SOUTH, SQUARE, SUMMARIZED, SURFACE, TABLE, TABULAR, TIP, TOP, WATER, WEST	Hard	Forward, Backward, Diagonal
Introduction to Ecosystems		ABIOTIC FACTORS, AQUATIC, BIODIVERSITY, BIOTIC FACTORS, COMMUNITY, ECOSYSTEM, FOREST, GRASSLANDS, HABITAT, INTERACTIONS, LAKE, NICHE, POND, POPULATION, TERRESTRIAL	Big	Forward, Backward, Diagonal
Jane Goodall		AFRICA, ANIMALS, APE, CHIMPANZEES, CONSERVATION, DANGEROUS, DOCUMENTARY, EDUCATION, ENVIRONMENT, FAMOUS, INFORMATION, LECTURE, LONDON, NATURE, OBSERVATION, RESEARCH, STUDY, TRAVEL, UNIVERSITY, ZOO	Big	Forward, Backward, Diagonal
Landforms		ALLUVIAL FAN, ARCHIPELAGO, BADLANDS, BARRIER ISLAND, BOX CANYON, CINDER CONE, COASTLINE, CORAL REEF, CRATER LAKE, DEPRESSION, DESERT, ESCARPMENT, FISSURE, GEOMORPHOLOGY, GLACIER, HIGHLAND, ICEBERG, ISTHMUS, KNOB, LAGOON, LANDFORM, LAVA DOME, MARSH, MESA, MORAINE, MOUNTAIN PEAK, NATURAL ARCH, OASIS, OCEANIC TRENCH, OVERHANG, OXBOW LAKE, PENINSULA, PLATEAU, PROMONTORY, RAPIDS, RIVULET, SANDBAR, SCARP, SEASHORE, SHORELINE, SPRING, SUMMIT, SWAMP, TAR PIT, TIDAL BASIN, TOPOGRAPHY, U SHAPED VALLEY, VOLCANO, WETLAND, YARDANG	Very Difficult	Forward, Backward, Diagonal
Landforms		AVALANCHE, DROUGHT, EARTHQUAKE, FLOOD, LANDSLIDE, VOLCANIC ERUPTION, WILDFIRE	Very Difficult	Forward, Backward, Diagonal
Landforms	Look for all words listed in the puzzle. Words can be forward, backward, and diagonal.	BEACH, CLIFF, COAST, DESERT, FOREST, HILL, ISLAND, LAKE, MOUNTAIN, OCEAN, PENINSULA, PLAIN, PLATEAU, PRAIRIE, RIVER, SWAMP, VALLEY, VOLCANO, WATERFALL	Big	Forward, Backward, Diagonal
Landforms		BLOCDK, CENTRAL, COASTAL PLAIN, EASTERN, EQUATOR, FAULT, FOLDED, INTERIOR PLAIN, LANDFORMS, LATITUDE, LONGITUDE, MERIDIAN, MOUNTAIN, PACIFIC, PLATEAU, PRIME, SSSSSSTANDARD, TIME, UPWARPED, VOLCANIC, ZONES	Big	Forward, Backward, Diagonal
Landscapes		ARCHIPELAGO, BAY, BEACH, BEACHES, CAPE, CLIFFS, COASTAL, CROPS, FERTILE, FISHING VILLAGES, FOOT, HILLS, ISLAND, LANDSACPE, LOWER COURSE, MAN MADE, MARINAS, MEANDERS, MIDDLE COURSE, MOUNTAIN, MOUTH, NATURAL, PLAINS, PLATEAUS, RELIEF MAP, RIVERS, SLOPES, SOURCE, SUMMIT, TOURIST RESORTS, TRIBUTARIES, UPPER COURSE, VALLEYS	Big	Forward, Backward, Diagonal
Let's Go Green!	Use the vocabulary you learned in class to complete this crossword!	ATMOSPHERE, BIKE, BIOMASS, CAMPAIGN, CONSEQUENCE, DRAMATIC, ENDANGERED, ENERGY, ENVIRONMENT, FASHION, FUR, GREEN, GREENHOUSE, NUCLEAR, PLANET, PLASTIC, RECYLE, SEA, SPECIES, TURBINE, WARMING, WASTE, WILD	Big	Forward Only
Life Cycles		ANIMALS, BABIES, BORN, DIE, DORMANCY, EGGS, FALL, FLOWERS, FRUITS, GARDENS, GERMINATE, GROW, HARVEST, HATCH, HIBERATE, INVERTEBRATES, LEAVES, LIVING THINGS, MIGRATE, NATURE, PLANTS, RIPE, SEASONS, SEEDS, SLEEP, SPORES, SPRING, SPROUT, SUMMER, TIME, TREES, VEGETABLES, VERTEBRATES, WEATHER, WINTER, YOUNG	Teenage	Forward, Backward, Diagonal
Mapping our Earth		CONIC, CONTOUR INTERVAL, CONTOUR LINES, DEPRESSION, ELEVATION, EQUATOR, FRACTIONAL SCALE, GEOLOGIC MAP, GLOBAL POSITIONING, GNOMIC, GRAPHIC SCALE, HACHURES, INDEX CONTOUR, INFRARED RADIATION, LANDSAT, LATITUDE, LONGITUDE, MAP LEGEND, MAP SCALE, MERCATOR, MERIDIANS, PARALLES, PRIME MERIDIAN, RADAR, REMOTE SENSING, SEA BEAM, SONAR, TIME ZONES, TOPEXPOSEIDON, TOPIGRAPHIC, VERBAL SCALE	Hard	Forward, Backward, Diagonal
Marine Ecosystems		BARNACLE, BEACH, BRIDS, BY CATCH, CONSERVATION, CORAL REEF, CRAB, CREEK, ECOSYSTEMS, ESTUARY, FEEDING, FEMALE, FISHING, HABITAT, HATCHLING, HOOK, JELLY FISH, JUVENILE, LAND, MALE, MANGROVES, MARINE, NESTING, NET, NURSERY, OCEAN, PLASTIC, POLLUTION, PREDATORS, PREY, PROTECTION, SEA GRASS, SEA TURTLES, SQUID, THREATS, TOURISM	Hard	Forward, Backward, Diagonal
Marine Life		ALBATROSS, CRAB, DOLPHIN, LIONFISH, MANATEE, OYSTER, PENGUIN, SAILFISH, SCALLOP, SEA TURTLE, SEAHORSE, SEAL, SHARK, STARFISH, STONEFISH, TERN, TIGER PRAWN, TUNA, WALRUS, WHALE	Big	Forward, Backward, Diagonal
Marine Life		AIR, AMPHIBIAN, ANIMAL, AQUATIC, BASIS, BREATHE, BREATHING, CREATE, DOLPHIN, ECOSYSTEM, ESTUARY, EXHIBIT, FISH, FOOD, FORM, FOUNDATION, GROW, INVERTEBRATE, KEY, LAND, LIVING, LUNG, MAMMAL, MARINE, MODIFICATION, MOLLUSC, NATURE, OCEAN, OCTOPUS, ORGANISM, OXYGEN, PLANKTON, PLANT, PORTION, PRODUCE, PROTECTED, PROVIDE, RESPIRATION, SALT, SEAL, SEALION, SHORELINE, SKIN, SPACE, SURFACE, SURVIVE, TUBE, UNDERWATER, VERTEBRATE, WHALE	Very Difficult	Forward, Backward, Diagonal
Mountain ranges		ACONCAGUA, AFGHANISTAN, ALASKA, AMERICA, ARGENTINA, ASIA, BHUTAN, BOLIVIA, CHILE, CHINA, COLOMBIA, DENALI, ECUADOR, ELEVATION, EURASIAN, EVEREST, GREATER, HIGHEST, INDIA, KAZAKHSTAN, KONGUR, KUNLUN, KYRGYZSTAN, LARGE, LEVEL, METER, NEPAL, NORTH, PAKISTAN, PAMIR, PART, PEAK, PLATE, POINT, RANGE, REGION, RISE, RISING, RIVER, SEA, SEPARATE, SIGNIFICANCE, SOUTH, STATE, TAGH, TAJIKISTAN, TIBETAN, UZBEKISTAN, VALLEY, VENEZUELA	Very Difficult	Forward, Backward, Diagonal
Mountains		ACTION, AREA, ASIA, BUILD, CLIMATE, COLDER, CONDITION, CREATE, EARTH, ECOSYSTEM, ELEVATION, EVEREST, FORCE, FORM, FUJI, GROUND, HIGH, HIMALAYAS, HUGE, JAPAN, LAND, LARGE, LEVEL, LIMITED, LOCALLY, MAGMA, MELTING, MOUNT, OCCUR, OCEAN, OLYMPUS, ORDER, PEAK, PINATUBO, PLANET, PLATE, RAISE, RANGE, REACH, RIDGE, RISE, RIVER, ROCK, SEA, SHIELD, SLAB, SUMMIT, SURFACE, VOLCANO, WATER	Hard	Forward, Backward, Diagonal
Names of Different Trees		APPLE, ASH, BEECH, BIRCH, CHERRY, CHESTNUT, ELM, EVERGREEN, FIG, FIR, GINGO, HAWTHORN, HICKORY, JUNIPER, LARCH, MESQUITE, OAK, PINE, REDCEDAR, REDMAPLE, REDSPRUCE, SUGARMAPLE, WALNUT, WHITEPINE, WILLOW	Hard	Forward, Backward, Diagonal
Natural and Synthetic Resources	Highlight, circle or color the scrambled words. Refer to the word bank.	FOSSILS FUELS, GEOTHERMAL, HYDROELECTRIC, MAGMA CHAMBER, MINING, NATURAL GAS, NUCLEAR POWER, SOLAR, SOLAR PANELS, WIND	Hard	Forward, Backward, Diagonal
Natural Disaster		DISASTER, DROUGHT, EARTHQUAKE, FLOOD, FOREST FIRE, HURRICANE, OIL SPILL, TSUNAMI, TYPHOON, VOLCANO	Big	Forward, Backward, Diagonal
Natural Disaster		AVALANCHE, DROUGHT, EARTHQUAKE, FLOOD, LANDSLIDE, SINKHOLE, THUNDERSTORM, TORNADO, TSUNAMI, VOLCANO, WILDFIRE	Big	Forward and Backward
Natural Disasters		ACID RAIN, AIR POLLUTION, DEFORESTATION, DROUGHT, EARTHQUAKE, EROSION, ERUPTION, FLOOD, HAILSTORM, HEAVY RAIN, HURRICANE, LANDFILL, LIGHTNING, NATURAL DISASTER, OIL SPILL, OVERBUILDING, OVERCROWDED, POTHOLE, STRONG WIND, TORNADO, WATER POLLUTION, WILDFIRE	Big	Forward, Backward, Diagonal
Natural Disasters		ARSON, AVALANCHE, BAROMETER, BEAUFORT, BLIZZARD, BUSHFIRE, CLOUD, CYCLONE, DAMAGE, DEATH, DESTROY, DESTRUCTION, DISASTER, DROUGHT, DUST, EARTHQUAKE, EROSION, FATAL, FAULT, FIRE, FLOOD, FORCE, GUST, HAIL, HEAT, HIGH, HURRICANE, LAVA, LIGHTNING, MAGMA, MONEY, NIMBUS, PRESSURE, RAINSTORM, RESCUE, RICHTER, SANDSTORM, SCALE, SNOWSTORM, STORM, THUNDERSTORM, TORNADO, TREMOR, TSUNAMI, TWISTER, VIOLENT, VOLCANO, WAVE, WHIRLWIND, WIND	Very Difficult	Forward, Backward, Diagonal
Natural Resources		AIR, ANIMALS, ATMOSPHERE, CARBON DIOXIDE, COAL, COTTON, CYCLE, DIG IT, FOSSIL FUELS, NATURAL GAS, NATURAL RESOURCES, NONLIVING, NONRENEWABLE, OIL, OXYGEN, PETROLEUM, PLANTS, RENEWABLE, REPLACED, TREES, WATER, WIND	Big	Forward, Backward, Diagonal
Nature		ANT, BEE, BIRD, BUG, CLOUD, EARTH, FLOWER, FLY, FROG, GRASS, LEAF, MOUSE, PLANT, POND, RAIN, SKY, SLUG, SNAIL, SUN, TREE, WASP, WATER, WEED, WORM	Simple	Forward Only
Nature's Best		ACORNS, ANACONDA, ANIMALS, ANTELOPE, ASTEROID, AZALEAS, BLIZZARD, BLOSSOMS, CASHEWS, CHERRIES, COBWEBS, CRABS, DESERTS, EAGLES, ELEPHANT, GANDERS, GORILLA, HAWKS, HUMMINGBIRD, INSECTS, KATYDID, LEAVES, LOBSTERS, MAMMALS, MOUNTAINS, NECTAR, OCEANS, OSTRICH, RAINBOW, ROBINS, ROSES, SEASHELLS, SEASONS, SEEDLET, SEEDLING, SEQUOIA, SHEEP, SNOWSTORMS, SPIDER, STREAMS, SUNSHINE, SWALLOW, TADPOLE, TARANTULA, TIDES, TIGERS, TREES, VOLCANO, WATERFALLS, YUCCA	Very Difficult	Forward, Backward, Diagonal
Nitrogen Cycle		ACID, ALGAE, ATMOSPHERE, BACTERIA, CHLOROPHYLL, CONSTANT, FUNGI, LIVING, NITROGEN, NUCLEIC, ORGANISM, PART, PERCENTAGE, PLANT, PRESENT, PROTEIN, REMAIN, RESULT, ROOT, SOIL, SYNTHESIS, SYSTEM, USABLE, UTILISED, VITAMIN, WASTE	Big	Forward and Backward
Oak Trees		ACID, ACORN, AFRICA, AMERICA, APPROXIMATELY, ASIA, BEECH, CASUARINACEAE, CHINA, COMMON, CUP, CUPULE, DECIDUOUS, DISTINCT, ENDEMIC, ENTIRE, EUROPE, FAGACEAE, FAMILY, FEMALE, FLOWER, FORM, FRUIT, GENERA, GENUS, GREVILLEA, GROUP, LARGEST, LEAVE, LITHOCARPUS, MALE, MARGIN, MEXICO, MONOECIOUS, NATIVE, NORTH, NUT, OAK, PRODUCE, QUERCUS, SEED, SHRUB, SINGLE, SMALL, SMOOTH, SPECY, SPRING, STRUCTURE, TREE, UNITED	Very Difficult	Forward, Backward, Diagonal
Oak Trees		ACID, ACORN, AFRICA, AMERICA, APPROXIMATELY, ASIA, BEECH, CASUARINACEAE, CHINA, COMMON, CUP, CUPULE, DECIDUOUS, DISTINCT, ENDEMIC, ENTIRE, EUROPE, FAGACEAE, FAMILY, FEMALE, FLOWER, FORM, FRUIT, GENERA, GENUS, GREVILLEA, GROUP, LARGEST, LEAVE, LITHOCARPUS, MALE, MARGIN, MEXICO, MONOECIOUS, NATIVE, NORTH, NUT, OAK, PRODUCE, QUERCUS, SEED, SHRUB, SINGLE, SMALL, SMOOTH, SPECY, SPRING, STRUCTURE, TREE, UNITED	Very Difficult	Forward, Backward, Diagonal
Ocean		ALGAE, ANCHOR, BASS, BAY, BUOY, CLOWNFISH, CORAL, DEEPSEA DIVING, DOLPHIN, DOLPHIN WATCHING, EEL, FIN, FLOOR, FRESH, GULF, ISLANDS, JELLYFISH, KELP, LAYERS, MARINE, OCEAN, OFFSHORE, OUTGOING, PIER, PUFFERFISH, REEF, RIPTIDE, SALT, SAND, SCALES, SCHOOL, SEAGULL, SEAL, SEATURTLE, SHARK, SPONGE, SQUID, STINGRAY, SURFING, SWORDFISH, TIDALWAVE, TUNA, UNDERTOW, UNIQUE, VOLCANO, WASHUP, WATERFRONT, WHALE, YACHT	Very Difficult	Forward, Backward, Diagonal
Ocean		BANDEDBUTTERFLY, BARRICUDA, BEACH, BIRCHFISH, BLUEFINTUNA, BOATS, CLOWNFISH, CORAL, CORALREEF, CRAB, CUDDLEFISH, EGGS, FISH, GREYSEAL, HUMPBACKANGLERFISH, JELLYFISH, LIONFISH, LOBSTER, MARLIN, MERMAIDS, MORAYEEL, OCEAN, OCTOPUS, PUFFERFISH, ROCKS, SALMON, SALTWATER, SAND, SEAHORSE, SEASHELLS, SEASLUG, SEASNAKE, SEAWEED, SHARK, SHORE, SHRIMP, SQUID, STINGRAY, STONEFISH, SUNFISH, SWORDFISH, TIDEPOOL, TRIGGERFISH, TURTLE, WAVES, YELLOWTANG	Very Difficult	Forward, Backward, Diagonal
Ocean		ALGAE, ANTHOZOA, BARRACUDA, BARRIER REEF, BEAUTY, BERMUDA TRIANGLE, CLOWN FISH, CONCH, CORAL REEF, CRUSTACEAN, DIVERS, EUPHOTIC ZONE, FERTILIZER, FISH, GIANT SQUID, GROWTH, HORSESHOE CRAB, JUMBO SHRIMP, KILLER WHALE, MARINE BIOLOGY, MINERALS, NUTRIENTS, OCEAN, OCEANOGRAPHY, ORGANISMS, PERFORATE, PERIL, PHYLUM, PIGMENT, PLANKTON, POLYP, SALT WATER, SAND DOLLAR, SEA SHELL, SEA URCHIN, SEAWEED, SHALLOWS, SHOALS, SPECIES, SPONGE, TECTONICS, TENTACLES, TIGER SHARK, TRANSATLANTIC, TROPICAL, TUNA, TURTLE, VANESSA, VIEWING, ZOOPLANKTON	Very Difficult	Forward, Backward, Diagonal
Ocean Currents		BELT, BLOW, CALLED, CHANGE, CLIMATE, COOL, CREATE, CURRENT, DEEP, DENSE, DRIVE, EARTH, EFFECT, ENERGY, EQUATOR, EVAPORATE, EVAPORATION, FIGURE, FLOW, FORCE, GAS, GRAVITY, GULF, HIGHER, HOT, INCREASE, LARGE, LEVEL, LIQUID, LONG, MAKE, MOVE, MOVING, NORTH, OCCUR, OCEAN, PART, PATH, PATTERN, POLE, SALT, SIZE, STREAM, SUN, SURFACE, TIME, WARM, WATER, WIND	Big	Forward, Backward, Diagonal
Ocean Currents Word Search		CONTINENTAL DEFLECTIONS, CONVECTION CURRENT, CORIOLIS EFFECT, DEEP CURRENT, DENSITY, ENERGY, GLOBAL WINDS, GULF STREAM, OCEAN CURRENT, SURFACE CURRENT, UPWELLING	Big	Forward, Backward, Diagonal
Ocean Land Forms		CHANNEL, COAST, COVE, DELTA, GLACIER, GULF, ICEBERG, LAKE, OCEAN, POND, RAPIDS, REEF, RIVER, WATERFALL	Older Children	Forward, Backward, Diagonal
Ocean Life		ABYSSAL, ALBATROSS, BARNACLE, BATHYAL, BENTHIC, BENTHOS, BLUE WHALE, BOTTLE NOSE DOLPHIN, CLOWNFISH, CRAB, DIATOM, HADAL, HERMIT CRAB, HORSESHOE CRAB, HUMPBACK WHALE, JELLYFISH, KILLER WHALE, LEATHERBACK, LEOPARD SEAL, LOBSTER, MANATEE, MANTA RAY, MORAY EEL, NARWHAL, NEKTON, NERITIC, OCEANIC, OCTOPUS, PELAGIC, PELICAN, PENGUIN, PLANKTON, POLAR BEAR, PUFFERFISH, SCALLOP, SEA ANEMONE, SEA HORSE, SEA LION, SEA OTTER, SEA SLUG, SEA STAR, SEA TURTLE, SEA URCHIN, SEALS, SHARKS, SHRIMP, SPERM WHALE, SQUID, STING RAY, WALRUS	Very Difficult	Forward, Backward, Diagonal
Ocean Pollution		BOATS, CLEAN, CLEAR, CONSEQUENCES, DIRTY, DISEASES, DOLPHINS, ENVIRONMENT, FACTORIES, FISHES, FRESH, HARM, HUMAN, LIFE, MARINE, OIL, PLASTIC, SEA ANIMALS, SEWAGE, TRASH	Big	Forward, Backward, Diagonal
Ocean Tides and Weather		CONDENSATION, EVAPORATION, FULL MOON, GRAVITATIONAL PULL, HIGH PRESSURE, HIGH TIDE, HUMIDITY, HURRICANE, LAST QUARTER, LOW PRESSURE, LOW TIDE, LUNAR CYCLE, NEAP TIDE, OCEAN, OCEAN CURRENTS, QUARTER MOON, SPRING TIDE, SURFACE WATER, TEMPERATURE, TIDES, WEATHER, WIND	Older Children	Forward, Backward, Diagonal
Ocean Water and Life		ABYSSAL ZONE, BENTHIC ZONE, BENTHOS, CHEMOSYNTHESIS, DENSITY, FOOD CHAIN, FOOD WEB, INTERTIDAL ZONE, MIXED ZONE, NEKTON, NERITIC ZONE, OCEANIC ZONE, PELAGIC ZONE, PHOTIC ZONE, PHOTOSYNTHESIS, PHYTOPLANKTON, PLANKTON, PRIMARY PRODUCTIVITY, PYCNOCLINE, SALINITY, THERMOCLINE, TROPHIC LEVEL, ZOOPLANKTON	Big	Forward, Backward, Diagonal
Ocean Waves		AMPLITUDE, BACKSHORE, BAR, BEACH, BERM, BREAKER, BREAKERZONE, BREAKING, CHOP, COAST, COASTLINE, CONVERGING, CREST, DIFFRACTED, DURATION, EBB, FETCH, FORESHORE, FREQUENCY, GRAVITY, HERTZ, INTERFERENCE, NEARSHORE, OFFSHORE, ONSHORE, PARALLEL, PEAKINGWAVE, PERIOD, PLUNGEPOINT, PLUNGING, RADIATING, REFLECTED, REFRACTED, REINFORCEMENT, REST, RIPFEEDERCHANNEL, RIPPLE, RUFFLE, SCARP, SHORELINE, SPEED, SPILLING, SURFZONE, SWELL, TIDES, TRAIN, TROUGH, WAVE, WAVELENGTH	Very Difficult	Forward, Backward, Diagonal
Oceania Geography		ABORIGINE, AUSTRALASIA, AUSTRALIA, AYRES ROCK, BASS STRAIT, BIOMES, COOK ISLANDS, CORAL SEA, COTTAGE INDUSTRIES, CRADLE MOUNTAIN, CULTURAL CONVERGENCE, CULTURAL DIVERGENCE, DIFFUSION, DISTRIBUTION OF CLIMATE, EL NINO, EQUATOR, GREAT BARRIER REEF, GREAT SANDY DESERT, GUAM, INDONESIA, INTERNATIONAL LEVEL, INTERNATIONAL RELATIONS, MARIANA TRENCH, MARSHALL ISLANDS, MELANESIA, MICRONESIA, MIGRATION, MOUNTAIN BARRIERS, NEW CALEDONIA, NEW ZEALAND, NULLARBOR PLAIN, OUTBACK, PACIFIC OCEAN, PAPUA NEW GUINEA, PHYSICAL PROCESSES, PITCAIRN, POLYNESIA, PRECIPITATION, SAMOA, SERVICE INDUSTRIES, SOLOMON ISLANDS, SOVEREIGN NATIONS, SUBSISTENCE AGRICULTURE, SUSTAINABLE DEVELOPMENT, TASMAN SEA, TRADITIONAL ECONOMIES, TROPIC OF CAPRICORN, TWELVE APOSTLES, ULURU, VANUATU	Hard	Forward, Backward, Diagonal
Oceanography		ACCRETION, ARCH, CAVE, CONSTRUCTIVEWAVES, CREST, DIFFRACTION, DISTRUCTIVEWAVES, EROSION, FETCH, GROYNE, GUTTER, HEAD, LONGSHOREDRIFT, NECK, ORBITFIELD, PILLAR, PLUNGING, REFLECTION, REFRACTION, REPLENISHMENT, RILLS, RIP, SANDBAR, SANDBUDGET, SCARP, SPILLING, STACK, STORMBAR, SURGING, SWELL, TROUGH, WAVELENGTH, WAVEPERIOD, WAVES	Hard	Forward, Backward, Diagonal
Oceans		ANTARCTIC, ARCTIC, ATLANTIC, CURRENT, DEADSEA, GLOBALOCEAN, GRAVITY, INDIAN, INTERCONNECTED, MEDITERRANEANSEA, MIDNIGHT ZONE, OCEAN, PACIFIC, SALINE, SEA, SUNLIT ZONE, TIDE, TWILIGHT ZONE, WORLDOCEAN, ZONE	Big	Forward and Backward
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