Click on the picture to make it larger.
Aug 26, 2011
Aug 15, 2011
Breath on a cold day
Your breath is warmer than the air outside on a cold day. When you breathe in, your lungs warm up the air because your body has a constant temperature of 37 Degrees Celsius. If the temperature of your breath suddenly decreases (like when you breathe out), condensation can occur, which is a bit like steam. This makes your breath turn to fog and dust in the air also helps you see it.
This is why you see your breath on a cold day.
Aug 12, 2011
Did you know?
Earth's human population is set to reach seven billion this year; twice as many people as there were in 1960. On current estimates, a global population of 10 billion is possible by the end of the century.
Subscribe to:
Posts (Atom)