The surroundings or conditions in which a person, animal, or plant lives or operates.

The physical world and everything in it (such as plants, animals, mountains, oceans, stars, etc.) that is not made by people.

The third planet from the sun in the solar system, the world on which we live.

The earth and all the people, places, and things on it.

A celestial body moving in an elliptical orbit around a star.

The condition that distinguishes animals and plants from inorganic matter, including the capacity for growth, reproduction, functional activity, and continual change preceding death.

A group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding.

A living organism that feeds on organic matter, typically having specialized sense organs and nervous system and able to respond rapidly to stimuli.

A living organism of the kind exemplified by trees, shrubs, herbs, grasses, ferns, and mosses, absorbing water and inorganic substances through its roots, and synthesizing nutrients in its leaves by photosynthesis using the green pigment chlorophyll.

A woody perennial plant, typically having a single stem or trunk growing to a considerable height and bearing lateral branches at some distance from the ground.

The seed-bearing part of a plant, consisting of reproductive organs (stamens and carpels) that are typically surrounded by a brightly colored corolla (petals) and a green calyx (sepals).

A large natural stream of water flowing in a channel to the sea, a lake, or another such stream.

A large natural elevation of the earth's surface rising abruptly from the surrounding level; a large steep hill.

A very large expanse of sea, in particular, each of the main areas into which the sea is divided geographically.

A large area covered chiefly with trees and undergrowth.

A barren area of landscape where little precipitation occurs and, consequently, living conditions are hostile for plant and animal life.

The weather conditions prevailing in an area in general or over a long period.

The state of the atmosphere at a place and time as regards heat, dryness, sunshine, wind, rain, etc.

The degree or intensity of heat present in a substance or object, especially as expressed according to a comparative scale and shown by a thermometer or perceived by touch.

Moisture condensed from the atmosphere that falls visibly in separate drops.

Atmospheric water vapor frozen into ice crystals and falling in light white flakes or lying on the ground as a white layer.

The perceptible natural movement of the air, especially in the form of a current of air blowing from a particular direction.

A violent disturbance of the atmosphere with strong winds and usually rain, thunder, lightning, or snow.

A storm with a violent wind, in particular a tropical cyclone in the Caribbean.

A sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.

A mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust.

An overflowing of a large amount of water beyond its normal confines, especially over what is normally dry land.

A prolonged period of abnormally low rainfall, leading to a shortage of water.

The presence in or introduction into the environment of a substance or thing that has harmful or poisonous effects.

The action of conserving something, in particular preservation, protection, or restoration of the natural environment, natural ecosystems, vegetation, and wildlife.