Finally, discuss their answers as a class. Give examples from the article of physical and chemical changes. What aspects of fireworks relate to gas laws? What kind of chemical reaction produces the ...

New Year and fireworks. Pop! Bang! Whooo! Boom! We love them. These are the sounds of celebration. Although the basic recipe and techniques used in preparing the black powder (gun powder) in ...

The environmental advocates say the company routinely discharges plastic caps, wires, trash and other chemical covered debris into Mission Bay in violation of its fireworks permit. “Our view is ...