Slide 1 Pollution Slide 2 Smog smog – mixture of chemicals that forms a haze in the air (Nitrogen Oxides etc) smoke from cars and factories release the chemicals Slide…
Chapter 15 Refrigeration  Refrigeration systems: To cool a refrigerated space or to maintain the temperature of a space below that of the surroundings . Heat pump…
8th Grade Science Unit 7: Changes in the Earth Lesson 2: Global Warming â Who Moved the Carbon? Vocabulary of Instruction 1. Acid Rain Rain that has a pH lower than 7 because…