Earth's Atmosphere
Science

The release of harmful materials into the atmosphere by human and natural activity
Air pollution
The release of harmful materials into the atmosphere by human and natural activity. Air pollution. Air pollution is when harmful substances like gases, smoke, or chemicals are added to the air we breathe, making it dirty and unsafe.

The movement pattern in a fluid caused by temperature differences within the fluid
Convection current
The movement pattern in a fluid caused by temperature differences within the fluid. Convection current. It's the circular motion of fluid, like water or air, caused by warmer, less dense areas rising and cooler, denser areas sinking.

A wave of electric and magnetic energy that can travel through matter or a vacuum, like X-rays
Electromagnetic wave
A wave of electric and magnetic energy that can travel through matter or a vacuum, like X-rays. Electromagnetic waves are invisible waves of energy that include light, radio, and X-rays traveling through space.

Electromagnetic radiation with wavelengths shorter than visible light, it tans skin and can cause cancer
Ultraviolet radiation
Electromagnetic radiation with wavelengths shorter than visible light, it tans skin and can cause cancer. Ultraviolet radiation. Ultraviolet radiation is a type of light from the sun that is invisible to the eye and can cause skin damage.