What mineral is described below? - white and glassy in appearance - mass = 54 grams - volume = 20 milliliters - scratches a fingernail but not a penny - white streak - fizzes in acid a. calcite b. gypsum c. quartz d. dolomite

Iknow #2 is d. i just need to know why

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.