Which of the following is an example of how a scientist might use a model? microscopes are used to magnify a group of cells on sets of slides. marbles placed inside a hollow sphere are used to describe protons in a nucleus. a wrench is used to tighten a nut onto a piece of wood.
stopwatches measure the amount of time it takes for runners to complete a mil

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar. the following chemical equation shows the combustion of ethane. balance the equation by filling in the coefficients. c2h6 + o2 → co2 + h2o

Which excerpt from the land, part 4 best supports the claim that paul is a talented horseback rider? a/“figure that says more than anything else! now, i want to ride that stallion! " b/my daddy shook his head. "paul only rides horses he knows. ” c/? i glanced over at the other rider. the fellow was older than i, and had the weight of a man on him. d/a man out of alabama, man name of ray sutcliffe, told my daddy i was such a good rider, he wanted me to ride some races for him.

The buildup of sediments where a river empties into a slow-moving or nonmoving body of water is known as a/an