Month: July 2025

ATMOSPHERIC COMPOSITION – Earth’s atmosphere consists mainly of nitrogen (78%) and oxygen (21%), supporting life.

HYDROSPHERE – All the water on Earth, including oceans, rivers, lakes, and groundwater.

SEISMIC ACTIVITY – Earthquakes and volcanic eruptions caused by plate tectonics.

CARBON CYCLE – The process by which carbon moves between the atmosphere, oceans, and living organisms.

GREENHOUSE GASES – Gases like carbon dioxide, water vapor, and methane that trap heat in Earth’s atmosphere.

GOLDILOCKS ZONE – The habitable zone around a star where conditions allow for liquid water.

OZONE LAYER – A layer of ozone molecules in Earth’s stratosphere that absorbs ultraviolet (UV) radiation.

MAGNETOSPHERE – Earth’s protective magnetic field that shields the planet from harmful solar radiation.

BIOSPHERE – The part of Earth where life exists, including land, water, and air.

WATER CYCLE – The continuous movement of water between Earth’s atmosphere, surface, and underground reservoirs.