Which correctly lists three different geologic features that help scientists determine the relative ages of rocks by their positions? magma, erosion, and intrusions
erosion, magma, and cross-cutting relationships
intrusions, index fossils, and magma
index fossils, intrusions, and cross-cutting relationships

Which of the following is true about fossils? a. the relative age of fossils cannot be determined from their position in sedimentary layers. b. fossils found in lower layers of sedimentary rock are as old as fossils found in upper layers of sedimentary rock. c. fossils found in upper layers of sedimentary rock are older than fossils found in lower layers of sedimentary rock. d. fossils found in lower layers of sedimentary rock are older than fossils found in upper layers of sedimentary rock.

Dubai is challenged by all of the following environmental factors except a. a warm and dry climate b. a lack of annual rainfall c. scarce freshwater resources d. a lack of valuable natural resources

The meseta in spain is a a. navigable river b. castle c. coastal plain d.plateau