The following links are suitable to study the Unit Earths History.

The Origin and Structure of Earth

v     How was Earth formed?

http://members.aol.com/_ht_a/bobalien99/earthform.htm

Describes the process of accretion by which Earth is thought to have formed.

v     Layers of the Earth

http://www.educ.uvic.ca/Faculty/jtinney/earth%20science/StrEar.html

Shows the different parts of the Earth. It looks at each layer and describes briefly the thickness and the materials that make up each layer.

The Origin and Structure of Earths Atmosphere and Hydrosphere

v     The Origin of the Earth and its Atmosphere

http://www.env.leeds.ac.uk/envi1280/lecture_notes_carslaw1/sld002.htm

This slide show illustrates how the Earth and its atmosphere were formed.

v     Hydrologic Cycle (Water Cycle)

http://danpatch.ecn.purdue.edu/~epados/ground/src/cycle.htm#cycle

Introduces and discusses the processes in the water cycle. It also looks at how human activities and structure impact the water cycle.

The Origin and History of Life on Earth

v     Origin of Life

Ancient crystal questions Earth's history

http://news.bbc.co.uk/1/hi/scotland/1111088.stm

This article looks at present research conducted to determine what Earth looked like billions of years ago.

v     Identifying Unknown Fossils

http://www.uky.edu/KGS/coal/webfossl/pages/fossilid.html

Learn how to identify and classify fossils base on their shapes.

v     The Geologic Time Scale

Web Geologic Time Machine

http://www.ucmp.berkeley.edu/help/timeform.html

This website takes you through a time machine. You will discover in each era, the stratigraphy, ancient life, tectonics and localities.

v     Geologic Time

http://earthsci.org/teacher/basicgeol/geotim/geotim.html#Relative%20and%20Absolute%20Age

This site with the aid of diagrams differentiates between relative and absolute age.

v     Radiometric Dating

http://www.dc.peachnet.edu/~pgore/geology/geo102/radio.htm

Describes the principles of Radiometric Dating and shows how we can use this to determine the relative age of a fossil.

v     Glossary of Necessary Terms

http://www.columbia.edu/itc/anthropology/v1007/mack/sld001.htm

Defines terms associated with Earths History.

Activities

v     Label the Water Cycle diagram

http://www.enchantedlearning.com/geology/label/watercycle/

Learn the process in the Water Cycle by labeling the diagram.

v     Learning from the fossil Record

http://www.ucmp.berkeley.edu/fosrec/Learning.html

This website has activities that allow students to learn from fossil record and practice scientific skills.

v     What came first?

http://www.ucmp.berkeley.edu/fosrec/ScotchmoorFirst.html

Follow-up activity for sequencing fossils base on the date. There is a table that you can use to determine the date of the fossils.

v     Determining the age of rocks and fossils

http://www.ucmp.berkeley.edu/fosrec/McKinney.html

This is an activity site and students will determine the relative and absolute age of the fossils.

Review Questions on Earths History

v     Fossil, Geologic Time and Earth History

http://www.uwgb.edu/dutchs/Exams/202EXAMS/102geoltime.htm

v     Regents Prep: Earth Science

http://regentsprep.org/Regents/core/questions/question.cfm?Course=ESCI&TopicCode=06&QNum=1&Wrong=0

Both these websites are practice exercises after completing the unit Earths History. These websites allow you to answer the multiple choice questions and check your answers.