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Posts tagged air

March 6, 2018

 

Weather reports in the United States rarely distinguish between the ground and air temperatures.

What The Weather Report Doesn’t Tell You

There can be big variations in the temperature based on height and distance from the ground.

January 10, 2018

 

hot air balloon

Full of Hot Air?   

It's a gas! Air consists of nitrogen and oxygen and lots of empty space.

March 16, 2017

 

Fire is caused by a chemical reaction between oxygen and some kind of fuel which can consume buildings like this old mill

What Is Fire?

Is fire a solid? A liquid? A gas? Or something else?

August 3, 2016

 

Remember to cool off your soup so it is safe to eat!

Soup’s Ready!

Why does blowing on hot soup help to cool it off? The answer is evaporation.

July 29, 2016

 

Air pollution goes back far into earth's history.

You Are What You Breathe

Research suggests that early exposure to air pollution increases the risk of obesity.

November 30, 2014

 

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Is It Always Colder on Top of Mountains?

Where's the best place to keep warm, a mountain top or a valley? Well, it just depends...

November 27, 2014

 

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Fear of Suffocation

Don't worry, there's plenty of air to go around, even in tight spaces.

November 19, 2014

 

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Lighter Than Air

Human flight began as early as the 18th-century when scientists learned how to harness the power of different gases.

July 30, 2014

 

A cloud can weigh tons.

Floating Clouds

Despite weighing tons, clouds seem to free-float in the air. How do the billowy marvels stay up in the sky?

March 7, 2014

 

Even oxygen-breathing animals as ancient as trilobite didn't come around until long after Earth's atmosphere had become oxygen-rich.

A Change In The Air

Most of us take our oxygen-rich atmosphere for granted. Once upon a time, though, Earth's air was very different.

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