Geologic Time Scale Introduction

What does relative age tell us about a rock layer or fossil?

• The age of one rock layer or fossil compared to another.

• The relative age of a fossil determined by radiometric dating

• Younger rock layers sit on top of older rock layers

• Older rock layers sit on top of younger rock layers

Tags

NGSS.MS-ESS1-4

Use relative age dating to put the rock layers in correct order from oldest to youngest.

• B, D, A, E, C

• C, E, D, A, B

• A, C, E, D, B

• C, E, D, B, A

Tags

NGSS.MS-ESS1-4

When classifying time using the Geologic Time Scale which unit is the largest unit of time?

• Period

• Eon

• Epoch

• Era

Tags

NGSS.MS-ESS1-4

What are fossils that are abundant, easily recognizable, short lived, and widespread called?

• Preserved fossils

• Index fossils

• Imprints

• Radioactive dating

The end of the Mesozoic Era was most likely caused by?

• A meteor

• Too much oxygen

• Lowering sea levels

• An ice age

Tags

NGSS.MS-LS4-1

What two methods are used for determining the age of rocks and fossils?

• Relative and Absolute Dating

• Carbon and Water Dating

• Sedimentary and Igneous Rocks

• Spatial and Layered Dating

Tags

NGSS.HS-ESS1-5

Earth is thought to be formed ______ years ago?

• 200 thousand

• 3 million

• 4.6 billion

• who knows

Tags

NGSS.MS-ESS1-4

Jellyfish are one of the oldest species on Earth.  In what time period did they first appear?

• Precambrian Era

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

Tags

NGSS.MS-ESS1-4

What does "relative age" tell about a rock layer or fossil?

• The "exact age of a fossil determined by radiometric dating or the half life of radioactive elements.

• Easily recognizable

• Live a short time

• The age of one rock layer or fossil compared to another. (example: one is older or younger than the other)

Tags

NGSS.MS-ESS1-4

What does absolute age tell about a rock layer or fossil?

• Abundant

• The exact age of a fossil determined by radiometric dating or the half life of radioactive elements.

• The age of one rock layer or fossil compared to another.

• Wide geographic distribution

Tags

NGSS.MS-ESS1-4