Question

section two: earths history & rock layers (8 - ms - ess1 - 4) 1. the geologic time scale is based on: a. ocean tides b. fossil records and rock layers c. mountain heights d. tree rings 2. which type of rock layer is the oldest? a. top layer b. middle layer c. bottom layer d. theyre all the same age 3. what can scientists learn from fossils found in rock layers?

Explanation:

1. The geologic time scale is based on fossil records and rock - layers as they provide evidence of the history of life and Earth's geological events.
2. In undisturbed rock layers, the bottom layer is the oldest due to the principle of superposition where older layers are deposited first.
3. Fossils found in rock layers can tell scientists about past life forms, environments, and the relative age of the rock layer as different fossils are characteristic of different time periods.

Answer:

1. b. Fossil records and rock layers
2. c. Bottom layer
3. Information about past life forms, environments, and relative age of rock layers.