18) the process of deposition causes a) rock and soil to slowly be lost. b) rock and soil to quickly be lost. c) rock and soil to slowly be gained. d) rock and soil to quickly be gained. 19) roberto's family went to the coast of georgia. while they were there, roberto noticed that the rocks close to the water were smooth, and the rocks farther away from the water had more jagged edges. what most likely caused the rocks to be smooth instead of rough? a) birds pecking at the rocks b) fish swimming over the rocks c) the sun shining on the rocks d) waves crashing down on the rocks 20) deposition is a process that involves wind carrying sediment and then depositing it in a particular place. one common beach sight formed by deposition is a a) reef. b) sand dune. c) sand castle. d) barrier island. 21) batteries properties battery brand average life cost a 12 hours $0.50 b 18 hours $2.00 c 24 hours $3.50 if a battery is needed for a smoke detector where the biggest priority is for the device to last as long as possible, then which brand is the best choice? a) battery a b) battery b c) battery c d) all 3 brands are equally good choices. eliminate 23) about 21% of earth's atmosphere is composed of oxygen. oxygen can combine with other substances. the chemical reaction of oxygen with other substances is called oxidation and it is a source of chemical weathering. the building on the left has undergone oxidation. compare the picture on the left with the picture on the right. the building has changed. the rock has changed much like the building. describe how the rock on the right has changed over time. a) chemical weathering has happened due to acid rain in the area. b) oxygen has chemically reacted with minerals in the rock; oxidation has occurred. c) water in the atmosphere has caused the rock to rust; it has physically weathered. d) physical weathering has taken place and the rock is broken down into smaller pieces. eliminate