Answers to Questions Kids Ask! - Where "Why?" Turns to "Wow!"
Born on this day
September 19, 20111931 - Brook Benton
1934 - Brian Epstein
1928 - Pete Murray
1933 - David McCallum
1940 - Zandra Rhodes
1940 - Bill Medley
1945 - Kate Adie
1946 - Michael Elphick
1948 - Jeremy Irons
1949 - Twiggy
1963 - David Seaman
Air is primarily made up of two elements, nitrogen and oxygen. Nitrogen makes up 78.05% of air and oxygen another 20.95%. The remaining less than 1% is primarily argon, but carbon dioxide, neon, helium, methane and krypton are also present in air. Air also contains suspended dust, spores, and bacteria, as well as water. The amount of air varies tremendously with location, temperature, and time. In deserts and at low temperatures, the content of water can be less that 0.1% by volume. In warm, humid zones the air may contain over 6% water.
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How does a hot air balloon work?
The basic principle of ballooning is simple: Warm air rises. If warm air is contained in a lightweight bag it will rise until the temperature of the air inside the…
Why doesn’t alcohol freeze?
Alcohol will freeze, but only at extremely low temperatures. Water’s freezing point is 0 degrees Celcius, but the freezing point of ethanol (the alcohol you’re talking about) is -114 degrees…
Why in some places, like the desert, is it very hot in the day and very cold at night?
This is because rocks (including sand) have low heat capacities (the amount of energy needed to raise their temperature). This means that they heat up easily during the day, and…
Why do I get a stitch in my side when I run?
When you run, you use more oxygen than you do when you’re walking or resting. If you aren’t able to compensate by pumping your blood faster and breathing more deeply,…
Do fish breathe water?
Yes, fish essentially breathe water through their gills, but they don’t use the water to make energy, but the oxygen that is dissolved in the water. In essence, fish are…