PPT-Geologic Time Scale

8 th Grade Science Geologic Time Geologic time Earths history is divided into units of time that make up the Geologic T ime S cale Time units on the scale are based on the appearance . 01: . Geologic Time . Scale. Huge sections of time are broken down into smaller groups of time:. E. ons, Eras, . P. eriods, and . E. pochs. Eon. is the largest time block. . (kind of like what we would think of as years).. 01: . Geologic Time . Scale. Huge sections of time are broken down into smaller groups of time:. E. ons, Eras, . P. eriods, and . E. pochs. Eon. is the largest time block. . (kind of like what we would think of as years).. Who was James Hutton?. In the late 1700s, James Hutton began to question some of the ideas regarding the Earth.. He found fossils and saw them as evidence of life forms that no longer exist. . Different types of fossilized creatures were found in different layers of rock.. Relative Dating. How old is the Earth?. The Earth is about 4.6 billion years old. Much of its history is recorded in the rocks. Observations of fossils, rock types, evidence of . faulting, uplift, and folding as well as igneous . Geological “Clocks”. Geologic time determination is subdivided into 2 categories:. Relative Dating: simply determines whether or not an event occurs before or after another event (e.g. a granite dike is younger than the surrounding sandstone since it intrudes across the sandstone in an outcrop).. To learn how the geologic timeline was made and how the length of the various periods are different. Agenda. Progress reports – need to be signed by Parent/guardian. Geologic History Notes. Project –highlights. Regents Earth Science. Miss Wojdan. The . presence of coal in Antarctica indicates . that. Forests can grow on continental . . glaciers. Coal can form in cold climates. Antarctica’s climate was once warmer. Formation of the Sun, Planets and Earth (Notes 1). How our planet was structured during formation (Notes 2). Most recently we have discussed Earth’s history and the methods we use for putting together the story of our planet.. Section 12.1 Discovering earth’s history. Uniformitarianism – the idea that physical, chemical, and biological laws that operate today also operated in the past; the present is the key to the past.. Geologic Time and Evolution Earth Has a History Geologic materials record enormous changes. Earth is a complex, evolving system. Physical and biological systems continuously interact. Earth constantly changes and has done so through time. Using Content Analysis to Investigate the Treatment of Spatial and Temporal Scale in K-8 Science Standards and Textbooks Kim A. Cheek and Lauryn A. Stark Content Analysis Systematic coding and analysis of texts or visual material 99.9% of all living things that have ever existed on earth have gone extinct. earth has experienced 5 five extinctions . Geologic time scale. Era. Largest unit of geologic time . lasts tens to hundreds of millions of years and consists of two or more periods. . ___When you started second grade. ___When you were born. ___ When you started kindergarten. ___When you learned to ride a bike.. ___ When you learned to walk.. ___ When you learned to read.. ___ When you lost your first tooth.. On the Cutting Edge – Professional Development for Geoscience Faculty . Teaching About Time Workshop. Ilyse Resnick. Premise of talk. The representation of extreme temporal magnitudes is subject to the same forces that guide our comprehension of conventional time.