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100

the vertical height above the sea level.

ALTITUDE

100

a source of heat that originates from the Earth.

GEOTHERMAL

100

defined as an envelope of air, gases, and suspended articles surrounding the earth.

ATMOSPHERE

100

a large, slow-moving mass of ice formed from compacted layers of snow, found in polar regions and high mountains.

GLACIER

100

a well-engineered manner of watering agriculture.

IRRIGATION

100

an airstream having a high-velocity and high-altitude which blows from the west to the east.

JET STREAM

200

the area or region where a species of animals or plants reside.

HABITAT

200

known as a biological community of interacting organisms and their physical environment working together and interacting as one whole system.

ECOSYSTEM

200

it is everything that is around us; all living or non-living things occurring naturally and coexisting together.

ENVIRONMENT

200

the process by which natural forces such as wind, water, or ice wear away rocks, soil, and other surface materials.

EROSION

200

someone that does originate from natural matter; can be known as inanimate, lifeless, or extinct.

INORGANIC

200

a prolonged time with less than average rainfall which can negatively affect living conditions.

DROUGHT

300

half of a sphere and since the earth is a sphere it means half the earth. The earth is divided by the equator into two of these: The Northern and the Southern. 

HEMISPHERE

300

the art of making maps or mapping.

CARTOGRAPHY

300

all the animal life present in a particular region or time.

FAUNA

300

the act of maintaining natural or human-made landscapes just the way they are, without any changes.

CONSERVATION

300

the malicious act of cutting down trees and clearing forests for human use.

DEFORESTATION

300

the study of Earth's landscapes, people, places, and environments.

GEOGRAPHY..........DUH!!

400

the damp heaviness in the air is known as humidity. It is the result of the water vapor content in the atmosphere.

HUMIDITY

400

a triangular plain at the end or mouth of a river where the soil is deposited.

DELTA

400

known as the variation of climatic conditions and the result of new weather patterns that are distinct from past decades.

CLIMATE CHANGE

400

a gradual increase in the Earth's temperature that has constantly been discussed by environmentalists in recent years.

GLOBAL WARMING

400

the process of water turning into vapor.

EVAPORATION

400

a deep valley with steep sides, often carved by river erosion.

CANYON

500

massive layers of ice covering an extensive area that is superior to 50,000 square kilometers. Ice sheets can currently be found in Antarctica and Greenland.

ICE SHEET

500

the plants of a specific region, geographic location, or geological period.

FLORA

500

a natural fuel such as gas or coal; it is a fuel source that is formed by natural processes or organisms.

FOSSIL FUEL

500

a fuel that is derived from living or natural matter; gas, alcohol, and dead biological materials.

BIOFUEL

500

the gradual movement of Earth's continents over geological time due to plate tectonics.

CONTINENTAL DRIFT

500

a complex phenomenon when the gases in the Earth's trap the solar radiation as a consequence of atmospheric carbon dioxide, water vapor, and methane.

GREENHOUSE EFFECT

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