Which is an example of how living things play a role in physical weathering? a. wind carries grains of sand and dirt that hit the surface of a rock. b. water that has seeped into a rock expands as it freezes, pushing out every tiny crevice it has dripped into. c. tree roots climb into cracks in rocks, causing pressure that splits the rocks as the roots grow. d. water from a waterfall beats against the rocks at its base, breaking them apart

4. now look at the green lines you created by connecting the three boiling point data points and the three melting point data points. for each of these lines, describe any trends you see. 5. locate the elements on your periodic table that you circled in green on your graph. what term or description would you use to identify these elements with respect to the periodic table? 7. using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers.