Molten iron has a density of 7 .0g/cm3. In it's solid state,
iron has a density of 8.0g/cm3.
a) Calaulate the volume of 10kg of molten iron.

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.