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Additional Lessons 191 - 200 of 1000 for Geologic Time
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191. Mesozoic Era in Arkansas
...E SCHOOL GRADE LEVEL AND COURSE: 8th grade Earth Science TOPIC: Mesozoic Era in Arkansas SYNOPSIS OF LESSON: This lesson is a revision of a lesson on the Mesozoic Era in Arkansas, based on the research I have done this summer at Great Lakes Chemical Company. Student will continue their study of the geology of Arkansas from 225 million year ago to 65 million years ago by learning about the types of strata laid down by the Gulf of Mexico while it covered this area and as it withdrew. We will also learn of the economic importance to this community of what happened and why the bromine industry of the United State is center...
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Grade Level: 6-8
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192. Fossil Inferences
Fossil Inferences Summary: Students will use their knowledge about fossils to arrange fossil pictures in sequence from oldest to youngest. Main Curriculum Tie: Science - 4th Grade Standard 4 Objective 2 Explain how fossils can be used to make inferences about past life, climate, geology, and environments. Materials: Pencils Colored Pencils Drawing Paper, Cardstock Handouts: Nonsense Cards Set A, Fossils Cards Set B (1), Fossils Cards Set B (2), Stratigraphic Section for Set B, Fossil Map of Utah Additional Resources Books The Amazing Earth Model Book, Donald M. Silver & Patricia J. Wynne, ISBN # 0-5...
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Grade Level: 3-5
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193. Rock Discovery
...lesson, students should understand the processes that form the three main types of rock, as well as identify characteristics of some common rocks. Rocks are combinations of minerals found naturally on or in Earth. Rocks record the history of Earth in their structure. Earth materials can change over time from one form to another. Rocks can be identified by properties such as color, crystal size or texture, banding patterns, presence of pores, and other characteristics. Color is an easy one for students but not all that helpful. The size and shape of the particles that make up rock or lack of them, are more meaningful. C...
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Grade Level: 3-5
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194. TRB 4:4 - Investigation 3 - Examining Your Fossil
...dentify fossils by examining them with a hand lens to look at their different characteristics. Each of the fossils they made and discussed in Investigation Two can be examined by hand lenses. Examining fossils helps us learn about Earth's history. They help make inferences about past life, climate, geology, and environments. Scientists are able to construct geologic time scales when they find fossils. They are used to determine the time period an unknown rock layer was deposited. Certain fossils have been found to occur only in specific layers of rock. Fossils that have this characteristic are called index fossils. Whe...
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Grade Level: 3-5
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195. What Came First?
WHAT CAME FIRST? JUDITH SCOTCHMOOR THIS ACTIVITY is an effective follow-up to Sequencing Time. After sequencing events in their own lives and assigning each a numerical time, students use the same process to sequence actual events in the evolution of life on Earth. Objectives: (1) Students will gain an understanding of deep time 4.6 billion years of Earth's history. (2) Students will become familiar with events...
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Grade Level: 9-12
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196. Inferring Ancient Environments From Fossil Foraminifera, A Classroom Activity
...logy students. Prerequisites: In order to complete this activity, the student should have a concept of the foraminifera and how different benthic foraminifera prefer a particular environment which may be associated with water-depth. The student should also have had an introduction to the concept of geologic time and feel comfortable working with a map. Familiarity with the concepts of petroleum reservoir rock and source rock from studies of earth sciences is useful. Introduce the concept that benthic foraminifera live in a preferred environment; but, after their death their shells may be transported to a different envi...
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Grade Level: 6-8
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197. Climate Analysis Using Planktonic Foraminifera
...foraminifera. They should have a concept that our planet's climate has not always been as it is today. A review of the use of Neogloboquadrina pachyderma coiling ratios as a proxy for paleoclimate would be useful. Neogloboquadrina pachyderma is an excellent recorder of climatic temperatures through geologic time. When the earth experiences periods of relatively cold temperatures, ocean waters are cooler and Neogloboquadrina pachyderma forms its test (shell) such that it coils to the left. Alternatively, during periods of relatively warm temperatures when ocean waters are warmer, Neogloboquadrina pachyderma constructs i...
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Grade Level: 6-8
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198. Determining Age of Rocks and Fossils
...ly want to know how old a fossil is, but they want to know how that age was determined. Some very straightforward principles are used to determine the age of fossils. Students should be able to understand the principles and have that as a background so that age determinations by paleontologists and geologists don't seem like black magic. There are two types of age determinations. Geologists in the late 18th and early 19th century studied rock layers and the fossils in them to determine relative age. William Smith was one of the most important scientists from this time who helped to develop knowledge of the succession o...
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Grade Level: 6-12
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199. Interpreting Paleoenvironments With Microfossils
INTERPRETING PALEOENVIRONMENTS WITH MICROFOSSILS STEPHEN J. CULVER INTRODUCTION ONE OF the basic tenets of geology is the present is the key to the past . In the present context this simply means that if we document the distribution of organisms today, and have some degree of understanding of what combination of environmental variables controls those distributions, then we can use this information to reconstruct past environments...
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Grade Level: 9-12
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200. Where in the World is Carbon Dioxide?
...n organic matter burns (such as during forest fires). Anything that releases into the atmosphere (living, dead, or non-living) is considered a source Anything that absorbs and holds from the air or water is considered a sink (because, like a sink in your home, it acts as a "holding reservoir") Over geologic time, sources and sinks generally balance. In today's atmosphere, however, levels are climbing in a dramatic and easily measurable fashion, providing evidence that there are now more sources than sinks. What are the sources for this 'extra' ? Human activities are thought to be primarily responsible for the observed...
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Grade Level: 6-8
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