What is a major disadvantage of wood harvesting

If the particles in a sample of matter have an orderly arrangement and move only in place, the sample is a

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?