to soak up.
to gather or collect.
to adjust to new surroundings or a new situation.
modern farming methods that include mechanical, chemical, engineering and technological methods. Also called industrial agriculture.
the art and science of cultivating the land for growing crops (farming) or raising livestock (ranching).
natural or artificial movement of air in a closed environment. Also called ventilation.
plenty or more than enough.
to study in detail.
having to do with water.
land used for, or capable of, producing crops or raising livestock.
inflammation of a joint often resulting in pain and stiffness.
to evaluate or determine the amount of.
disease that makes it difficult to breathe.
to shock and amaze.
layers of gases surrounding a planet or other celestial body.
strong dislike or repulsion.
a dip or depression in the surface of the land or ocean floor.
hard, protruding jaws of a bird.
all the different kinds of living organisms within a given area.
scientist who studies living organisms.
living organisms, and the energy contained within them.
natural or artificial line separating two pieces of land.
line separating geographical areas.
dense growth of bushes, shrubs, and small trees.
sale of goods and services, or a place where such sales take place.
tactic that organisms use to disguise their appearance, usually to blend in with their surroundings.
growth of abnormal cells in the body.
one of the top layers of a forest, formed by the thick leaves of very tall trees.
carbon compound (such as carbon dioxide) released into the atmosphere, often through human activity such as the burning of fossil fuels such as coal or gas.
cows and oxen.
member of a country, state, or town who shares responsibilities for the area and benefits from being a member.
all weather conditions for a given location over a period of time.
edge of land along the sea or other large body of water.
measure of the amount of a substance or grouping in a specific place.
management of a natural resource to prevent exploitation, destruction, or neglect.
to use up.
person who uses a good or service.
one of the seven main land masses on Earth.
to change from one thing to another.
level of conservation between "endangered" and "extinct in the wild."
order of reptiles that includes crocodiles, alligators, caimans, and gharials.
learned behavior of people, including their languages, belief systems, social structures, institutions, and material goods.
structure built across a river or other waterway to control the flow of water.
to rot or decompose.
type of plant that sheds its leaves once a year.
organism that breaks down dead organic material.
destruction or removal of forests and their undergrowth.
to lower the quality of something.
having parts or molecules that are packed closely together.
construction or preparation of land for housing, industry, or agriculture.
foods eaten by a specific group of people or other organisms.
spread of something to a new area.
debate or argument.
unique or identifiable.
varied or having many different types.
to overpower or control.
dung of certain animals, usually in pellet form.
period of greatly reduced precipitation.
time of year with little precipitation.
strong and long-lasting.
having to do with money.
community and interactions of living and nonliving things in an area.
act and industry of traveling for pleasure with concern for minimal environmental impact.
able to be eaten and digested.
ability to accomplish a task.
uppermost layer of a forest, where sunlight is plentiful and trees tower on thin trunks.
to enclose or completely confine.
to inspire or support a person or idea.
to trespass or enter upon the property or rights of another.
to put at risk.
native to a specific geographic space.
to compel or force a course of action.
to lure, or lead on with hope and desire.
conditions that surround and influence an organism or community.
process by which liquid water becomes water vapor.
loss of water from the Earth's soil by evaporation into the atmosphere and transpiration by plants.
tree that does not lose its leaves.
unusual or extraordinary.
area used for agriculture.
animals associated with an area or time period.
having to do with money.
plants associated with an area or time period.
leaves of a plant, or the leaves and branches of a tree or shrub.
plants grown and harvested for human consumption.
to search for food or other needs.
ecosystem filled with trees and underbrush.
ground-level layer of a forest.
management, cultivation, and harvesting of trees and other vegetation in forests.
portion or section.
delicate or easily broken.
having to do with a habitat or ecosystem of a lake, river, or spring.
to give money to a program or project.
(singular: fungus) organisms that survive by decomposing and absorbing nutrients in organic material such as soil or dead organisms.
wild animals hunted for food.
system or order of a nation, state, or other political unit.
gas in the atmosphere, such as carbon dioxide, methane, water vapor, and ozone, that absorbs solar heat reflected by the surface of the Earth, warming the atmosphere.
environment where an organism lives throughout the year or for shorter periods of time.
the gathering and collection of crops, including both plants and animals.
organism that eats mainly plants and other producers.
significant or important to history.
containing a large amount of water vapor.
person who gets food by using a combination of hunting, fishing, and foraging.
the rate of producing, transferring, or using hydroelectric energy, often measured in kW or mW.
offer or encouragement to complete a task.
to add or become larger.
having to do with factories or mechanical production.
structures and facilities necessary for the functioning of a society, such as roads.
first step or move in a plan.
small indentation in a shoreline.
new, advanced, or original.
chemical substance used to kill insects.
material used to keep an object warm.
two or more individuals or communities that rely on each other for survival.
having to do with the national governments of more than one state.
to contribute time or money.
to study or examine in order to learn a series of facts.
tropical ecosystem filled with trees and underbrush.
complex, constantly changing pattern of shapes and colors.
organism that has a major influence on the way its ecosystem works.
site where garbage is layered with dirt and other absorbing material to prevent contamination of the surrounding land or water.
distance north or south of the Equator, measured in degrees.
animals raised for sale and profit.
industry engaged in cutting down trees and moving the wood to sawmills.
profitable or money-making.
organ in an animal that is necessary for breathing.
long-tailed parrot native to the Americas.
infectious disease caused by a parasite carried by mosquitoes.
animal with hair that gives birth to live offspring. Female mammals produce milk to feed their offspring.
a skillful movement.
having to do with the ocean.
mammal that carries its young in a pouch on the mother's body.
very large or heavy.
having to do with curative therapy (medicine).
area connecting wildlife habitats disturbed and interrupted by human activity. Also called a green corridor.
process of extracting ore from the Earth.
screen used to display an electronic device's video output.
political unit made of people who share a common territory.
a material that humans take from the natural environment to survive, to satisfy their needs, or to trade with others.
sweet plant material that attracts pollinators.
having to do with a way of life lacking permanent settlement.
business that uses surplus funds to pursue its goals, not to make money.
substance an organism needs for energy, growth, and life.
fossil fuel formed from the remains of marine plants and animals. Also known as petroleum or crude oil.
collection of trees and shrubs that has not been harvested for timber or other uses in about 200 years, although definitions vary. Also called a primeval forest, primary forest, primal forest, or ancient woodland.
composed of living or once-living material.
living or once-living thing.
drug or having to do with drugs and medications.
plant with large, flat leaves native to the Americas.
process by which plants turn water, sunlight, and carbon dioxide into water, oxygen, and simple sugars.
person who is among the first to do something.
chemical material that can be easily shaped when heated to a high temperature.
infection where lungs fill with fluid.
animal, object, or force such as wind that transfers pollen from one plant to another, allowing seeds to develop.
type of plastic used as a foam (for packing), fiber (for clothing), hard lining (for coatings), or flexible material (similar to rubber).
all forms in which water falls to Earth from the atmosphere.
animal that hunts other animals for food.
animal that is hunted and eaten by other animals.
type of mammal, including humans, apes, and monkeys.
leading or dominant.
before or ahead of.
to encourage or help.
services that protect the health of an area, particularly sanitation, immunization, and environmental safety.
moist wood fibers from which paper is made.
amount of precipitation that falls in a specific area during a specific time.
area of tall, mostly evergreen trees and a high amount of rainfall.
unrestrained or widespread.
practice of raising livestock for human use, such as food or clothing.
bird of prey, or carnivorous bird.
to lower or lessen.
to determine and administer a set of rules for an activity.
to resist or push back.
scientific observations and investigation into a subject, usually following the scientific method: observation, hypothesis, prediction, experimentation, analysis, and conclusion.
order of mammals often characterized by long teeth for gnawing and nibbling.
to quickly and playfully run from one place to another.
to make a rough, high-pitched cry.
formal or official stamp, emblem, or other mark.
marine algae. Seaweed can be composed of brown, green, or red algae, as well as "blue-green algae," which is actually bacteria.
section or a part of something.
part of a plant from which a new plant grows.
type of agriculture where a field or plot is cleared, cropped, and harvested until its fertility is exhausted. Also called slash-and-burn, milpa and swidden.
having to do with a high-pitched, piercing sound.
type of plant, smaller than a tree but having woody branches.
to move in a secretive or stealthy manner.
method of agriculture where trees and shrubs are cleared and burned to create cropland.
to slide along a surface, from side to side.
top layer of the Earth's surface where plants can grow.
radiation from the sun.
light and heat from the sun.
scattered and few in number.
to anchor or make strong and reliable.
type of organic compound that is often important to the functioning of an organism.
type of agriculture in which farmers grow crops or raise livestock for personal consumption, not sale.
human construction, growth, and consumption that can be maintained with minimal damage to the natural environment.
land permanently saturated with water and sometimes covered with it.
wooded areas in cool, mild climate zones that receive high amounts of rainfall.
degree of hotness or coldness measured by a thermometer with a numerical scale.
having to do with the Earth or dry land.
cloth or other woven fabric.
device used to establish and maintain a temperature.
organism that may soon become endangered.
to develop and be successful.
rise and fall of the ocean's waters, caused by the gravitational pull of the moon and sun.
wood in an unfinished form, either trees or logs.
species at the top of the food chain, with no predators of its own. Also called an alpha predator or apex predator.
large-billed bird native to South America.
area of land.
buying, selling, or exchanging of goods and services.
historic or established by custom.
evaporation of water from plants.
stream that feeds, or flows, into a larger stream.
existing in the tropics, the latitudes between the Tropic of Cancer in the north and the Tropic of Capricorn in the south.
grouping of tall evergreen trees, usually close to the Equator, which receives more than 203 centimeters (80 inches) of rain a year.
region generally located between the Tropic of Cancer (23 1/2 degrees north of the Equator) and the Tropic of Capricorn (23 1/2 degrees south of the Equator).
thick part of an underground stem of a plant, such as a potato.
ecosystem between the canopy and floor of a forest.
one of a kind.
having to do with city life.
all the plant life of a specific place.
almost or nearly.
to say, sing, or otherwise make a vocal noise.
level of conservation between "near threatened" and "endangered." Vulnerable is the lowest of the "threatened" categories.
material that has been used and thrown away.
movement of water between atmosphere, land, and ocean.
movement of air (from a high pressure zone to a low pressure zone) caused by the uneven heating of the Earth by the sun.
system of sectioning areas within cities, towns, and villages for specific land-use purposes through local laws.