23. These people believed that the universe arose from the infinite sea at the first rising of the a. Muslims c. Europeans b. Egyptians d. Americans 24. Choose the most appropriate description of the hydrosphere. c. only surface wate a. the mixture of gases that surround around the earth b. the waters on earth including subsurface d. only atmospheri 25. All living organism of the earth, including those on land, water and air, are considered part a. biosphere c. atmosphere b. hydrosphere d. geosphere 26. Which of the following is NOT one of the four major geological subsystems of the earth? a. biosphere c. atmosphere b. watersphere d.geosphere 27. Which of these is NOT an example of physical weathering? a. freeze-thaw c. human activity such as mining b. acid rain falling on limestone d. wind blowing sand onto rock 28. Which of these is NOT an example of physical weathering? a. freeze-thaw c. human activity such as mining b. acid rain falling on limestone d. wind blowing sand onto rock 29. What happens to pieces of rock as they are transported by a river? a. They get smaller and more rounded. c. They get smaller and jagged. b. They get larger and more rounded d. They get larger and jagged. 30. In hydration, water is an active agent of chemical weathering. What happens when water loo minerals of the rock? a, cements them tom​