Geologic Time Review

If one body of rock contains fragments of another body of rock, it must be younger than the fragments it contains is the definition of which law?

• Law of Inclusions

• Law of Superposition

• Cross-Cutting Law

• Law of Proportions

The diagram below represents a cross section of the earth's crust showing several rock layers containing marine fossils. What does the squiggly line between layers 1 and 2 represent?

• a fault

• an unconformity from erosion

• an intrusion of igneous rock

• inclusions of of metamorphic rock

Tags

NGSS.MS-ESS1-4

The diagram represents a cross-section of the Earth's crust showing rock units & a fault. Which rock is the oldest?

• Shale

• Basalt

• Sandstone

• Limestone

Tags

NGSS.MS-ESS1-4

Geologist have subdivided geologic time into units based on what?

• rock type

• erosion rates

• landscape development

• fossil evidence

Tags

NGSS.MS-ESS1-4

What is geologic timescale?

• Fossils that are widespread over a large area of earth and only existed for a short amount of time and are used to give approximate numerical dates to rock formations and geologic events

• Chart used to describe earth's history by dividing it into various periods based on the fossil record

• Fossils and the rocks they are found in can be arranged in a definite order according to their age

• Rocks metamorphosed by the magma are older than the intrusion or lava flow, unmetamorphosed rocks are younger than the lava flow

Tags

NGSS.MS-ESS1-4

What is correlation?

• Matching a rock layer or rock unit in one place with the same rock layer in another location

• any break in the rock record when erosion took place instead of deposition

• the time it takes half the atoms of a parent isotope to decay into atoms of the daughter isotope

• the spontaneous breaking apart (decay) of nuclei of atoms

Tags

NGSS.MS-ESS1-4

What are the principles of cross-cutting relationships?

• fundamental principle of geology that states the processes which occur on Earth today are the same as always

• the absolute age of a rock or mineral calculated using ratios of parent & daughter isotopes

• Younger features cut across or through older features

• Isotope formed from the decay of an unstable isotope

What is the principle of superposition?

• youngest layer on the bottom

• oldest layer on the top

• oldest layer on the bottom

• all the layers are random

Tags

NGSS.MS-ESS1-4

What part of an ancient animal would you expect to fossilize?

• Heart

• Bones

• Eyes

• Liver

Tags

NGSS.MS-LS4-1

What is a fossil?

• an isotope formed from the decay of an unstable isotope

• Remains or traces of ancient life

• a fundamental principle of geology that states the processes that occur on Earth today are the same as what's always occurred

• Any break in the rock record when erosion took place instead of deposition

Tags

NGSS.MS-LS4-1