Question

1. how do sedimentary rocks form on earths surface? a in vertical stripes b with no clear pattern c in horizontal layers d in a random pattern
2. what are strata? a inconsistencies in the fossil record b rock layers c well - known and widespread fossils d units of time
3. what is normally found at the lowest stratum? a all of the fossils b all of the volcanic ash c the youngest rock d the oldest rock
4. stratigraphy is the study of a evolution b human history c rock layers d earths atmosphere
5. which of the following is not a unit of geologic time? a epoch b millennium c era d age
6. which of the following describes the relative age of someone or something? a kaitlyn is younger than dillon b dillon is 13 years old c the trilobite is an index fossil d the trilobite appeared 521 million years ago

Explanation:

1. Sedimentary rocks form in horizontal layers due to the way sediments settle.
2. Strata are rock layers.
3. In undisturbed rock - layer sequences, the oldest rock is at the lowest stratum.
4. Stratigraphy is the study of rock layers.
5. Millennium is a general time - keeping unit not specific to geologic time. Epoch, era, and age are geologic time units.
6. Relative age is a comparison of ages. Saying Kaitlyn is younger than Dillon is a relative - age statement.

Answer:

1. C. in horizontal layers
2. B. rock layers
3. D. the oldest rock
4. C. rock layers
5. B. millennium
6. A. Kaitlyn is younger than Dillon