Class 9 S.S.T. - Shaping The Earth's Surface & Atmosphere and Climate

Vocabulary flashcards reviewing landform processes, agents of erosion, atmospheric layers, weather instruments, and climate concepts from Class 9 S.S.T.

Erosion

The process involving the wearing away of the Earth's surface and the removal of sediments.

Weathering

The process of breaking down rocks into smaller particles at or near the Earth's surface.

Deposition

The process of laying down sedimentary material.

Delta

A landform commonly formed by river deposition.

Barchan

A crescent-shaped sand dune formed by wind.

Meanders

Winding bends formed in the course of a river.

Moraines

Sediment deposits carried and left behind by glaciers.

Atmosphere

A layer of gases surrounding the Earth, mainly composed of nitrogen.

Troposphere

The lowest layer of the atmosphere where most weather phenomena occur.

Stratosphere

The atmospheric layer where the ozone layer is mainly found.

Ozone Layer

A layer mainly found in the stratosphere that protects life from harmful ultraviolet radiation.

Weather

The condition of the atmosphere at a particular place and time, which changes over a short period.

Climate

The average weather conditions or long-term average pattern of weather of a place over a long period.

Barometer

An instrument used to measure atmospheric pressure.

Humidity

The amount of water vapour present in the air.

Rain Gauge

An instrument used to measure rainfall.

Precipitation

Moisture falling from the atmosphere, whose forms include rain, snow, and hail.

Atmospheric Pressure

The force exerted by atmospheric gases, which generally decreases as altitude increases.