In both types of reactions, new substances are formed and there are changes in energy. However, endothermic reactions absorb energy, whereas exothermic reactions release energy. Reteach Change the boldface sentences into questions, and call on students to answer them.
The average monthly cell phone bill has soared in recent years to well over $100. A study earlier this year found that Verizon (VZ) was the most expensive carrier, with an average customer bill of $148 a month. Sprint (S) and AT&T (T) weren't that far behind, and T-Mobile (TMUS) was the least expensive of the Big Four carriers at $120.
That update can be found here. The average monthly electric bill for residential properties in Hawaii was $203.15, the highest in the nation for 2012, according to recently released data from the U.S. Energy Information Administration (EIA). The average residential electric bill, by contrast, in New Mexico was $74.62, the lowest in the nation. In the contiguous United States, the South Atlantic region had the highest average monthly electric bill at $122.71, while the Pacific region (California, Oregon, and Washington) had the lowest.