Welcome to Clip from Spiral logo

Interactive video lesson plan for: What Causes The Smell After Rain?

Activity overview:

Most people notice a distinctive smell in the air after it rains – but where does it come from?

Learn more at HowStuffWorks.com:
http://science.howstuffworks.com/nature/climate-weather/atmospheric/question479.htm

Share on Facebook: http://goo.gl/Nbf9w4
Share on Twitter: http://goo.gl/u9pSiL
Subscribe: http://goo.gl/ZYI7Gt
Visit our site: http://www.brainstuffshow.com

If you’ve ever strolled around outside after a storm, you’ve probably noticed a… distinctive smell. This aroma, known as petrichor, is often associated with spring, just like we frequently associate the smell of fresh-cut grass with summer. So what’s going on here? I mean, water itself doesn’t have this smell, so why does rain? As it turns out, there’s more than one kind of ‘rain smell’, and a number of factors that cause it.

One smell comes before the rain even hits the ground. It’s slightly sweet, sharp and (according to some people) reminiscent of chlorine. That’s ozone. During a storm, lightning can split oxygen and nitrogen molecules. These can recombine into nitric oxide, and that oxide can react with other atmospheric chemicals to form ozone. The wind from an approaching storm can carry this ozone scent from the clouds straight to your nose. But that’s not the only aroma in the mix.

One of the more pleasant rain smells is actually caused by bacteria. Yep. A type of bacteria called actinomycetes grows in soil when conditions are damp and wet. When the soil dries, this bacteria produces spores. The wetness and force of rain kicks these tiny spores into the air. The moisture after rainfall acts kind of like an aerosol air freshener, because this moist air can easily carry the spores, we breathe them in and boom – we sense that distinctive, ‘earthy’ scent so often associated with everything from a drizzle to a storm. This bacteria is extremely common, and people across the world will recognize the aroma. Because the spores release when soil dries out, this scent is strongest after rain that breaks a dry smell.

These are some of the most common after-rain smells, but there are all sorts of other scents that could come into play. This is why when you and a friend talk about the smell of rain, you might be describing a few completely different things.

SOURCES:

http://science.howstuffworks.com/nature/climate-weather/atmospheric/question479.htm

http://blogs.howstuffworks.com/transcript/what-causes-the-smell-after-rain.htm

https://www.youtube.com/watch?v=qJKz1C1mK80

http://www.huffingtonpost.com/2012/07/19/rain-smells-approaching-storm_n_1686589.html

http://www.smithsonianmag.com/ist/?next=/science-nature/what-makes-rain-smell-so-good-13806085/

http://www.livescience.com/37648-good-smells-rain-petrichor.html

Tagged under: brainstuff,brain stuff,howstuffworks, stuff works,science,technology,cristen conger,stuff mom told ,rain smell,smell rain, smell rain,rain,weather,storm,petrichor,actinomycetes,geosmin,lightning,ozone,smell rain,smell rain,rain smell , rain smell

Clip makes it super easy to turn any public video into a formative assessment activity in your classroom.

Add multiple choice quizzes, questions and browse hundreds of approved, video lesson ideas for Clip

Make YouTube one of your teaching aids - Works perfectly with lesson micro-teaching plans

Play this activity

1. Students enter a simple code

2. You play the video

3. The students comment

4. You review and reflect

* Whiteboard required for teacher-paced activities

Share on:

Share What Causes The Smell After Rain? on Google+ Share What Causes The Smell After Rain? on Twitter Share What Causes The Smell After Rain? on Facebook Pin What Causes The Smell After Rain? Email What Causes The Smell After Rain?

Ready to see what else Spiral logo can do?

With four apps, each designed around existing classroom activities, Spiral gives you the power to do formative assessment with anything you teach.

Quickfire

Carry out a quickfire formative assessment to see what the whole class is thinking

Discuss

Create interactive presentations to spark creativity in class

Team Up

Student teams can create and share collaborative presentations from linked devices

Clip

Turn any public video into a live chat with questions and quizzes

1000s of teachers use Spiral to deliver awesome, engaging activities that capture students' understanding during lessons.

Now it's your turn Sign up

Spiral Reviews by Teachers and Digital Learning Coaches

Spiral
Review of Spiral by teacher: Kathryn Laster @kklaster

Tried out the canvas response option on @SpiralEducation & it's so awesome! Add text or drawings AND annotate an image! #R10tech

Spiral
Review of Spiral by teacher: Room 220 Math Stars @3rdgradeBCE

Using @SpiralEducation in class for math review. Student approved! Thumbs up! Thanks.

Spiral
Review of Spiral by teacher: Miss Ord @ordmiss

Absolutely amazing collaboration from year 10 today. 100% engagement and constant smiles from all #lovetsla #spiral

Spiral
Review of Spiral by teacher: Adam J. Stryker @strykerstennis

Students show better Interpersonal Writing skills than Speaking via @SpiralEducation Great #data #langchat folks!

Spiral
Review of Spiral by teacher: Dr Ayla Göl @iladylayla

A good tool for supporting active #learning.

Spiral
Review of Spiral by teacher: Brett Erenberg @BrettErenberg

The Team Up app is unlike anything I have ever seen. You left NOTHING out! So impressed!

Get the Clip Chrome Extension & Create Video Lessons in Seconds

Add Clip to Chrome