Find a
Resource
Select grade level(s) Select resource type(s) Select collection(s) Select standard(s) Skip navigation Digital Library for Earth System Education
Digital Library for Earth System Education
Search tips
Results 31 - 40 of 372 <<  1 2 3 4 5 6 7 8  >>
Comment on this resource
This spiral graph visualization, which includes both marine and terrestrial components, represents 4.5 billion years of geologic time. Stratigraphy, paleontology, and geochronology study results provide evidence in support of this old earth. This graphical representation is from an article called Age of the Earth. Full description.
Grade level: Informal, General public
Resource type: Illustration - scientific
Subject: Geologic time
 
Choosing & Using this resource...
Related resources and collections
This resource is included in the following collections:
Cutting Edge    Browse collection
Comment on this resource
This is an interactive exercise about Geologic Time. It focuses on how geologists and archaeologists determine the ages of rocks and ancient artifacts. This is a beta release of an instructional activity still under development. Virtual Dating contains two modules as well as a demonstration version. One module is Virtual Dating Isochron for rocks and minerals and the other is Virtual Dating Radiocarbon ... Full description.
Grade level: High (9-12), College (13-14), College (15-16)
Resource type: Computer activity
Subject: Geologic time
 
Choosing & Using this resource...
Comments and Teaching Tips
Read (7)
Related resources and collections
This resource is included in the following collections:
DLESE Community Collection (DCC)    Browse collection
Community Annotated Collection     Browse collection
Comment on this resource
This page has an illustration of the 4.5 billion year old Earth's time scale shown as a spiral with pictorial representations of both marine and terrestrial life. The text discusses how the age of the Earth is determined. The illustration is from the USGS General Interest Publication, Geologic Time by William L. Newman. Full description.
Grade level: General public
Resource type: Visualization - scientific, Ref. material
Subject: Geologic time
 
Choosing & Using this resource...
Related resources and collections
This resource is included in the following collections:
DLESE Community Collection (DCC)    Browse collection
Comment on this resource
This web page addresses the question: How do we know the Age of the Earth? by citing radiometric dates from rocks and minerals of the Earth, Moon, and meteorites. The methods of radiometric dating are also discussed. Viewers will find a table of the common radiometric dating isotopes, their daughter elements, and their half-lives. This material was adapted from The Age of the Earth, by the Branch ... Full description.
Grade level: General public
Resource type: Ref. material
Subject: Geologic time
 
Choosing & Using this resource...
Related resources and collections
This resource is included in the following collections:
DLESE Community Collection (DCC)    Browse collection
Comment on this resource
This resource contains reference materials on the radiocarbon dating method. Beginning with a summarization of the method, descriptions of three principal means of measuring residual carbon14 (c14) activity follow, including gas proportional counting, liquid scintillation counting, and accelerator mass spectrometry (AMS). External sites concerning radiocarbon dating applications are then indexed by ... Full description.
Grade level: College (13-14), College (15-16), Graduate / Professional, General public
Resource type: Ref. material
Subject: Geologic time
 
Choosing & Using this resource...
Related resources and collections
This resource is included in the following collections:
DLESE Community Collection (DCC)    Browse collection
Comment on this resource
This site contains 24 questions on the topic of geologic time, which covers dating techniques and unconformities. This is part of the Principles of Earth Science course at the University of South Dakota. Users submit their answers and are provided immediate feedback. Full description.
Grade level: College (13-14), College (15-16)
Resource type: Assessment / Evaluation
Subject: Geologic time
 
Choosing & Using this resource...
Related resources and collections
This resource is part of :
 
This resource is included in the following collections:
DLESE Community Collection (DCC)    Browse collection
Comment on this resource
This webpage of the National Park Service (NPS) and United States Geological Survey (USGS) discusses geologic time and what it represents. Beginning about 4.6 billion years ago and ending in the present day, this site exhibits (to scale) the various eras, periods, eons, and epochs of Earth's history with a downloadable geologic time scale available. Links provide maps of what the Earth looked like ... Full description.
Grade level: Middle (6-8), High (9-12), College (13-14)
Resource type: Ref. material
Subject: Geologic time
 
Choosing & Using this resource...
Related resources and collections
This resource is referenced by :
This resource is referenced by :
 
This resource is included in the following collections:
DLESE Community Collection (DCC)    Browse collection
Comment on this resource
In this activity, students are introduced to sequencing and geologic time through relative dating techniques. Students begin by categorizing cards of nonsense words, then move on to cards with pictures of fossils. Once students begin to grasp "relative" dating, they can extend their knowledge of geologic time by exploring radiometric dating and developing a timeline of Earth's history. There is a ... Full description.
Grade level: Middle (6-8), High (9-12)
Resource type: Lab activity, Illustration - scientific
Subject: Geologic time
 
Choosing & Using this resource...
Educational standards associated with this resource:
National Science Education Standards (NSES): Read
Comments and Teaching Tips
Read (1)
Related resources and collections
This resource is included in the following collections:
DLESE Community Collection (DCC)    Browse collection
Community Annotated Collection     Browse collection
Comment on this resource
In this activity, students gain an understanding of relative and numerical time by placing events in sequence and assigning relative times to the events. This will familarize them with the methods used by scientists to develop the geologic time scale. This activity contains objectives, materials, procedure, and extensions. Full description.
Grade level: Middle (6-8)
Resource type: Classroom activity
Subject: Geologic time
 
Choosing & Using this resource...
Educational standards associated with this resource:
National Science Education Standards (NSES): Read
Related resources and collections
This resource is included in the following collections:
DLESE Community Collection (DCC)    Browse collection
Comment on this resource
This Geological Society of America (GSA) site contains a detailed geologic time scale as an educational resource. It may be downloaded to a larger size, and includes all Eras, Eons, Periods, Epochs and ages as well as magnetic polarity information. Full description.
Grade level: High (9-12), College (13-14)
Resource type: Ref. material
Subject: Geologic time
 
Choosing & Using this resource...
Related resources and collections
This resource is referenced by :
 
This resource is included in the following collections:
DLESE Community Collection (DCC)    Browse collection
Results 31 - 40 of 372 <<  1 2 3 4 5 6 7 8  >>