Environmental Science Word Search From Pollution to Conservation

Print a vocabulary puzzle and its answer key for a unit on pollution, climate, natural resources or water testing.

Name Date

Environmental Science Word Search

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

0 of 16 words found

BFLAQUIFERSCRST

TSPOZONEHFLBUED

GEOTHERMALRTKGX

WOLDAFUWRDFENLF

ZLLZBUEESKIMIAD

CSUQISSTUCBITCT

ENTSTHELSRWSBIM

DTICAUWATERSHED

LAOATEANAZZIDRF

USNROYGDIEEORON

RPYBOLEXNLTNOAF

RUNOFFONASMUUES

ITTNHDIYBMZSGRE

NCLANDFILLDCHSR

QDBIODIVERSITYP

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.

RunoffRUNOFF
LandfillLANDFILL
EmissionEMISSION
SewageSEWAGE
PollutionPOLLUTION
CarbonCARBON
OzoneOZONE
DroughtDROUGHT
GlacierGLACIER
GeothermalGEOTHERMAL
AquiferAQUIFER
BiodiversityBIODIVERSITY
HabitatHABITAT
SustainableSUSTAINABLE
WetlandWETLAND
WatershedWATERSHED

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

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Word list

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Answer key: Environmental Science Word Search

BFLAQUIFERSCRST

TSPOZONEHFLBUED

GEOTHERMALRTKGX

WOLDAFUWRDFENLF

ZLLZBUEESKIMIAD

CSUQISSTUCBITCT

ENTSTHELSRWSBIM

DTICAUWATERSHED

LAOATEANAZZIDRF

USNROYGDIEEORON

RPYBOLEXNLTNOAF

RUNOFFONASMUUES

ITTNHDIYBMZSGRE

NCLANDFILLDCHSR

QDBIODIVERSITYP

RUNOFF, LANDFILL, EMISSION, SEWAGE, POLLUTION, CARBON, OZONE, DROUGHT, GLACIER, GEOTHERMAL, AQUIFER, BIODIVERSITY, HABITAT, SUSTAINABLE, WETLAND, WATERSHED

Next step Play pollution bingo with the class Build a puzzle from your own field study words

All 130 words

Pollution and Waste 28

Acid rain Precipitation with a low pH, caused by sulfur dioxide and nitrogen oxides in the air.
Algal bloom A sudden thick growth of tiny green water life, often fed by nutrients washed off the land.
Biodegradable Able to be broken down by bacteria and fungi.
Dead zone A low-oxygen area of an ocean or large lake where most animals cannot stay.
Dust Tiny dry bits of soil and other solids that the wind lifts into the air.
Effluent Wastewater that flows from a sewer or factory outfall into surface water.
Emission A gas or particle sent out into the air, as from a tailpipe or a smokestack.
Eutrophication Too many nutrients washing into a lake or bay, which feeds algae and can use up the oxygen.
Fertilizer Material added to soil to feed plants; washed into a lake, it feeds algae too.
Hazardous Describes waste that can harm human health or the environment.
Herbicide A weed killer: a substance used to control unwanted plants.
Landfill An engineered site where solid waste is buried and watched for leaking gas and liquid.
Leachate Liquid that seeps through buried waste and picks up harmful substances on the way.

Show all 130 words (117 more)

Pollution and Waste, continued

Lead A toxic heavy metal, one of six common air pollutants the EPA sets limits for.
Litter Waste left in the wrong place, such as cans, cups and food wrappers.
Microplastic A synthetic solid particle from 1 micrometer to 5 millimeters across.
Noise Unwanted sound from traffic, machines and aircraft that can harm people and animals.
Oil spill A release of liquid petroleum into the environment, most often at sea.
Particulate A tiny solid or liquid bit hanging in the air; the finest are 2.5 micrometers or less.
Pesticide A substance used to control pests; weed killers are the most widely used kind.
Pollution Harmful substances or energy, such as noise or heat, put into the natural environment.
Radon A radioactive gas with no color or smell that seeps out of soil and rock.
Runoff Rain or snowmelt that flows over land, carrying fertilizer, oil and soil into streams.
Sewage Used water from homes and businesses, carried away in sewers.
Smog Air pollution that blurs the view; the name blends smoke and fog.
Soot Impure carbon particles left when fuel does not burn completely.
Toxin A poison made by a living cell or organism.
Wastewater Water that has already been used in a home, farm, business or factory.

Climate and Atmosphere 22

Acidification The ongoing drop in the ocean's pH as seawater absorbs carbon dioxide.
Aerosol A haze of tiny solid bits or droplets floating in the air, such as smoke, mist or sea spray.
Albedo The share of sunlight a surface reflects, from 0 for none to 1 for all.
Bleaching Coral turning white as it loses its algae, most often because the water is too warm.
Carbon The element in coal, oil and gas that joins with oxygen when they burn.
Drought A shortage of water after months or years of too little rain.
Glacier A lasting body of ice that moves slowly under its own weight.
Greenhouse A glass building that holds in warmth; it names the gases that trap heat in the air.
Heat wave Several days in a row of weather far hotter than normal for the place.
Ice core A cylinder drilled from a glacier; its layers of old snow help reconstruct past climate.
Ice sheet A frozen mass covering more than 50,000 square kilometers, as in Antarctica or Greenland.
Keeling curve A graph of the air's carbon dioxide, measured at Mauna Loa in Hawaii since 1958.
Methane A heat-trapping gas, the main part of natural gas; livestock and landfills give it off.
Ozone A gas of three oxygen atoms: a sun shield high in the air, a pollutant near the ground.
Permafrost Ground frozen for two years or longer. As it thaws, it lets out carbon dioxide and methane.
Sea ice Frozen ocean water that floats; it covers about 7 percent of Earth's surface.
Sea level The average height of the ocean surface; it rose 15 to 25 cm between 1901 and 2018.
Sequestration Storing carbon in a pool such as a forest, soil or rock, out of the air.
Stratosphere The layer of air above the one we live in. Most of the ozone layer lies inside it.
Thaw What frozen soil does as it warms, letting microbes release carbon dioxide or methane.
Ultraviolet The kind of sunlight that the ozone layer absorbs most of.
Warming With global, the ongoing rise in Earth's average temperature.

Natural Resources and Energy 20

Aquifer An underground layer of rock, gravel, sand or silt that holds water.
Coal A black or brownish-black rock, mostly carbon, burned as a fossil fuel.
Dam A wall built across a river to hold the flow back.
Desalination Turning salt water into fresh water; brine is the by-product.
Fossil fuel Coal, petroleum or natural gas, formed underground from the remains of ancient organisms.
Fracking Cracking deep rock with high-pressure liquid so natural gas and petroleum flow more freely.
Geothermal Describes heat energy drawn from Earth's crust.
Hydro Short for power made from falling or fast-running water.
Mineral A natural solid mined from the ground, such as a metal ore; once used, it is not replaced.
Mining Taking minerals and other geological materials out of the Earth.
Ore Rock that holds enough valuable mineral, often metal, to be worth mining.
Peat Partly decayed plant matter that builds up in bogs; deep burial can turn it into coal.
Renewable Describes a resource that nature replaces on a human time scale.
Reservoir A lake made by people, most often by building a dam, to store fresh water.
Solar Describes energy that comes from the Sun's light and heat.
Tailings The material left over after the valuable part of an ore has been separated out.
Timber Trees or wooded land seen as a source of wood.
Water table The top of the underground zone where every pore and crack in the rock is soaked full.
Well A hole dug or drilled into the ground to reach water in an aquifer.
Wind Moving air; turbines use it to make electricity.

Conservation and Biodiversity 22

Basin With drainage, another name for a watershed: the land that sheds water to one river.
Biodiversity The variety of life on Earth, measured in genes, species and ecosystems.
Compost Leaves and food scraps broken down by microbes, with air, into a soil builder.
Corridor A strip of habitat that links wildlife populations cut off by roads, farms or towns.
Endangered Describes a species very likely to die out in the near future.
Extinction The end of a species, when its last member dies.
Fauna All the animal life found in a region.
Flora All the plant life found in a region.
Habitat The place where a plant or animal naturally lives.
Hotspot A region with a great variety of life that is threatened by human settlement.
Invasive Describes a species brought to a new place that harms its new environment.
National park A nature area owned and protected by a government for conservation.
Poaching Hunting or trapping wild animals against the law.
Recycle To process used paper, glass, metal or plastic so that it can be made into new things.
Refuge A protected area for wild animals; another name for a nature reserve.
Reserve A protected area managed to conserve its plants, animals or land features.
Restoration Helping a damaged or destroyed ecosystem to recover.
Seed bank A vault that keeps samples of many plant kinds for the future, to guard their genetic variety.
Sustainable Able to go on for many years without using up resources or harming nature.
Threatened Describes a species that is vulnerable to dying out in the near future.
Watershed Land from which all the surface water drains to one river, lake or ocean.
Wetland Land where water covers the soil or sits near its surface, such as a swamp, marsh or bog.

Land and Water Use 20

Aquaculture Farming fish, shellfish, algae or water plants under controlled conditions.
Bycatch Fish or other sea animals caught by accident while fishing for something else.
Clear-cut To log an area by felling most or all of its trees at once.
Crop rotation Changing what is planted on a field from season to season, so the soil is not worn out.
Deforestation Clearing a forest so the land can be used for farms, ranches or towns.
Erosion The wearing away of the upper layer of soil by water, wind or ice.
Fishery Waters where cod, salmon or oysters are raised or harvested, or the trade of doing so.
Floodplain The land beside a river that goes under water when the river runs high.
Impervious Describes a surface such as pavement or a roof that water cannot soak through.
Irrigation Bringing water to fields by canal, pipe or sprinkler so crops can grow where rain is short.
Levee A raised ridge along a riverbank, often built to keep floods off the land behind it.
Logging Cutting trees and moving them out of the forest for wood.
Monoculture Planting a whole field with just a single kind of crop.
Overfishing Taking so many from the sea that the stocks cannot breed fast enough to recover.
Overgrazing Letting animals feed on plants for too long, with no time for the plants to recover.
Rain garden A planted area built to soak up runoff from roofs, driveways and parking lots.
Silt Grains finer than sand and coarser than clay, carried in water as sediment.
Stormwater Rain and melted snow that runs off roofs and streets or soaks into the ground.
Topsoil The dark uppermost layer of the ground, richest in rotted matter and tiny living things.
Urban sprawl The rapid, low-density spread of a city over the land around it.

Testing Air, Water and Soil 18

Acidity What the pH scale measures; the lower the pH, the more of it a solution has.
Baseline A first set of measurements that later ones are compared against.
Coliform Bacteria counted in water, food and milk as a sign of poor sanitary quality.
Depth What a Secchi reading records: how far down the white disk can still be seen.
Hypoxia Low dissolved oxygen in water: 2 milligrams per liter or less.
Index One number that sums up many readings, as the AQI does for air pollution.
Indicator Describes a species whose health or numbers reveal the state of the environment.
Monitor To measure the same thing again and again over time in order to spot change.
Nitrate An ion of nitrogen and oxygen, common in fertilizers, that dissolves easily in water.
Phosphate A compound of phosphorus, a nutrient that can overfeed algae when it reaches a lake.
Probe A tool dipped into water to take a reading, such as dissolved oxygen.
Quadrat A frame, often square, that marks off a standard area for counting plants or slow animals.
Sample A small amount of air, water or soil collected for testing.
Secchi disk A plain white circle lowered into a lake until it vanishes, to measure how clear the water is.
Sediment Loose particles such as sand and silt that water, wind or ice carries and then drops.
Sensor A device that detects a condition such as temperature, light or dissolved oxygen.
Transect A fixed path along which an observer counts and records what is found.
Turbidity The cloudiness of water caused by tiny particles hanging in it.

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 Environmental Protection Agency pages (https://www.epa.gov/ghgemissions/overview-greenhouse-gases, https://www.epa.gov/acidrain/what-acid-rain) and Wikipedia, among them https://en.wikipedia.org/wiki/Sea_level_rise. 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

This environmental science word search opens on a finished puzzle: 16 of 24 key terms, Smog, Aquifer and Biodiversity among them. Eight more lists, from Pollution and Waste to Testing Air, Water and Soil, make 130 terms.

Read the full guide

Six lists, one for each strand of the course

Nine lists wait under the puzzle, at Start from a list. Six match the course: Pollution and Waste (28 words), Climate and Atmosphere (22), Natural Resources and Energy (20), Conservation and Biodiversity (22), Land and Water Use (20) and Testing Air, Water and Soil (18), fieldwork words, Quadrat to Secchi disk. Easy Environmental Science has 25 words of 3 to 5 letters, such as Smog and Peat.

Printing the sheet and its key

Print or save as PDF gives 2 pages on Letter or A4: the puzzle under a Name and Date line, then the answer key with every word ringed. For a file, pick Save as PDF in the print window.

Nineteen entries, like Acid rain and Secchi disk, hide as one run of letters: ACIDRAIN. Key terms are single words.
Eutrophication needs 14 squares: for Hard Environmental Science, the grid grows when a word finds no room.

Questions and answers

How is this different from an ecosystem or Earth Day word search?

An ecosystem word search covers food chains, producers, consumers and biomes. This one covers what people do to air, water and land, and how it is measured: Leachate, Albedo, Bycatch, Turbidity. An Earth Day puzzle is a shorter holiday list for younger pupils.

Which list suits a high school environmental science class?

Hard Environmental Science: 49 terms of 9 to 14 letters, such as Eutrophication, Sequestration and Desalination. Press Hard and words run in every direction, backwards too. Younger pupils can start on the easy list: Coal, Dam, Ozone.

Can I add terms from my own unit?

Yes. The list under the puzzle holds the 16 words on the sheet. Type to edit them, or paste your own list, one term per line, and it takes their place.

What is the Keeling curve?

A graph of the carbon dioxide in the air, measured at Mauna Loa in Hawaii since 1958. It is in Climate and Atmosphere, hidden as KEELINGCURVE. Tick Show clues, not words, in More options, and pupils hunt it from that definition.

All 130 words

Pollution and Waste 28

Pollution and Waste, continued

Climate and Atmosphere 22

Natural Resources and Energy 20

Conservation and Biodiversity 22

Land and Water Use 20

Testing Air, Water and Soil 18

How it works

Six lists, one for each strand of the course

Printing the sheet and its key

Questions and answers

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