Hooked On Science: ultimate snowball

INGREDIENTS

• Snow

INSTRUCTIONS
STEP 1:  Scoop up enough snow to fill your hands.
STEP 2:  Merge your snow filled hands together and apply pressure. Gradually increase the pressure while rotating your hands.
STEP 3:  Once you feel some resistance, smooth the surface of your snowball, throw the snowball, and observe.

EXPLANATION
Adding pressure to the snowball allows some of the snow to melt. When released, the liquid refreezes, fusing the snowball together. Thirty-two degrees is the ideal temperature for the perfect snowball. The amount of pressure needed to melt some of your snowball increases, the colder the temperature. Go to www.hookedonscience.org for more experiments that might get you and your family “Hooked on Science.”