Discuss the use of limestone as a building material. comment on the environmental, social, and economic
factors. in your opinion, do the benefits of using concrete outweigh the disadvantages?

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.