Why Does Rain Smell?

The video explores the unique aroma of rain, known as petrichor, which is a combination of scents from plant oils, soil bacteria, and ozone. Plant oils released during dry periods and geosmin from soil bacteria contribute to the earthy smell, while ozone, produced by lightning, adds a sharp scent. These elements together create the fresh and invigorating smell associated with rain.

What is the primary source of the fresh smell associated with rain?

• The wind during a storm

• The rocks in the soil

• Oils released by plants

• The rainwater itself

Which compound is responsible for the earthy smell of soil?

• Palmitic acid

• Petrichor

• Geosmin

• Ozone

How is geosmin released into the air?

• Through the decomposition of leaves

• By plants during photosynthesis

• By soil bacteria during rain

• Through evaporation

What is the role of ozone in the scent of rain?

• It adds a sharp, bracing aroma

• It enhances the smell of geosmin

• It is the main component of petrichor

• It neutralizes other scents

How is ozone formed in the atmosphere?

• Through the photosynthesis process

• By the decomposition of organic matter

• Through the ionization of oxygen by lightning

• By the evaporation of rainwater