Write a caption for your completed diagram that explains why the mass of the container increases when the steel wool is burned. Be sure to use the words: atom, compound, gas and solid in your answer.
Use the drawing tools to draw particle diagrams to show how the iron and oxygen atoms are arranged in each substance. Be sure to use different colors for each element.
What do you think? How will the mass before the fire compare to the mass after the fire?
How did the mass of the beaker and its contents change?