Front

Emit

Back

To produce or release light.

Front

Reflect

Back

To cast back light from a surface.

Front

Absorb

Back

To take up without reflecting.

Front

Greenhouse gas concentration is NONE

Back

Sunlight energy waves reach Earth, some are reflected back. Infrared energy waves escape easily into space. Temperature is lower.

Front

Greenhouse gas concentration is HIGH

Back

More infrared energy waves are trapped by greenhouse gases. Less energy escapes into space. Temperature increases significantly.

Front

Effects of Clouds

Back

Clouds reflect sunlight, affecting temperature. Removing clouds can cause temperature increase.

Front

Comparing Time Periods

Back

Greenhouse gases have increased over time. Temperature has increased alongside rising greenhouse gases.

Front

Natural vs. Enhanced Greenhouse Effect

Back

Natural Greenhouse Effect: Keeps Earth warm enough for life. Enhanced Greenhouse Effect: Increased due to human activities (burning fossil fuels), causing global warming.

Front

Composition of the Atmosphere

Back

The most abundant gas: Nitrogen (~78%). The second-most abundant gas: Oxygen (~21%). Other gases: Argon, Carbon Dioxide, and trace gases.

Front

Photosynthesis Equation

Back

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂ (Occurs in chloroplasts)