13. using methods to determine something's actual age is known as what? (2 points) absolute dating relative dating carbon 14 dating uranium 235 dating 14. describe two human actions that cause water pollution. (4 points) 15. which process would have the greatest negative impact on a forest? (2 points) wrting part clearing large tracks of land of all trees removing some of the overpopulated animals from a forest controlled burning of the underbrush selective thinning of some trees 16. the two types of weathering are (2 points) water and wind mechanical and chemical mechanical and wind biological and wind 17. can any type of rock become igneous rock? (2 points) no, only volcanoes produce igneous rocks no, one type of rock cannot change into another type of rock yes, rocks at the surface can change from any type to igneous yes, if they are pressed down into the earth's core and melt and cool to become igneous rocks 1 8. list and describe two ways that scientists can date fossils found in the earth. (4 points)