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Wilson Alwyn Bentley (1865-1931), famous for his photomicrographs of snow crystals, prepared sets of glass lantern slides of dew, frost and ice crystals. He obtained thousands of photomicrographs of individual ice crystals over the course of his lifetime. Images in this collection are scanned from glass lantern slides. Most snow crystals found in nature will fit into one of these seven main categories: ... Full description.
Grade level: Middle (6-8), High (9-12), College (13-14), College (15-16), Graduate / Professional
Resource type: Photograph, Ref. material
Subject: Atmospheric science, Cryology
 
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Educational standards associated with this resource:
National Science Education Standards (NSES): Read
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DLESE Community Collection (DCC)    Browse collection
DLESE Reviewed Collection (DRC) DLESE Reviewed Collection    Browse collection
Community Annotated Collection     Browse collection
Digital Water Ed Library (DWEL)     Browse collection
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This lesson plan is part of the DiscoverySchool.com lesson plan library for grades 9-12. It focuses on Galileo's observations and conclusions about Earth's place in the the solar system and how this was a conflict with the Catholic church, as well as the subsequent scientific revolution. Students look at current scientific conflicts to see what it was like for Galileo. It includes objectives, materials, ... Full description.
Grade level: High (9-12)
Resource type: Lesson plan
Subject: History and philosophy of science, Space science
 
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Educational standards associated with this resource:
National Science Education Standards (NSES): Read
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This activity is part of Planet Diary and is an online investigation of where earthquakes occur. Students research past earthquakes to see if any have occurred in their region. This activity has an accompanying page of websites for further research. Full description.
Grade level: Middle (6-8), High (9-12)
Resource type: Computer activity
Subject: Geology, Natural hazards
 
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National Science Education Standards (NSES): Read
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This lesson plan is part of a high school course on astronomy, Newtonian mechanics and spaceflight and provides a closer look at the pole star and the neighboring constellations, especially the Big Dipper and Cassiopeia. One objective is for the student to know the constellations of the Big Dipper and Cassiopeia, and their use in finding the Pole Star. The student will also realize that other celestial ... Full description.
Grade level: High (9-12)
Resource type: Lesson plan
Subject: Space science
 
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National Science Education Standards (NSES): Read
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In this lesson the ellipse is studied in polar coordinates (r,f), with the function cos(f). This places the origin point at a focus (more appropriate for planetary motion) and introduces the eccentricity e. It is also noted that planets actually orbit the center of gravity of the solar system and that distant planets may be detected by motions of their central star around the centers of gravity of ... Full description.
Grade level: High (9-12)
Resource type: Lesson plan
Subject: Mathematics, Space science
 
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National Science Education Standards (NSES): Read
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This document describes the nature and properties of the sun, its corona, and the solar wind. Students can read how the sun's energy comes from nuclear fusion and how its uneven rotation and churning of its upper layers produces sunspots. The sun's corona is described, and its anomalously high temperature when compared with deeper regions is pointed out. The site also describes how plasma from the ... Full description.
Grade level: High (9-12), College (13-14)
Resource type: Ref. material
Subject: Physics, Space science
 
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National Science Education Standards (NSES): Read
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This lesson will clarify the development of the geologic time scale. It will also introduce students to the major time periods in the history of Earth, as well as to the role fossils play in helping us understand this history. This lesson is based on an online booklet that provides an introduction to the study of the history of Earth, published by the U.S. Geological Survey. Using careful analogies ... Full description.
Grade level: High (9-12)
Resource type: Lesson plan
Subject: Geologic time, Paleontology
 
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National Science Education Standards (NSES): Read
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In this lesson students will examine how evolution has been scientifically explained historically. In doing so, students will examine the arguments and theories set forth by three historically important scientists: Jean Baptiste Lamarck, Alfred Russel Wallace, and Charles Darwin. The purpose of this lesson, however, is not to begin to make comparisons, but simply to help students understand how arguments ... Full description.
Grade level: High (9-12)
Resource type: Lesson plan
Subject: Biology, History and philosophy of science
 
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In this lesson, students will learn firsthand, by reading his journal entries and letters, how Darwin arrived at his theory. They also will gain a better sense of Darwin's journey and the role it played in his scientific career. In the first activity, Darwin's Great Voyage of Discovery, students will read his account of his voyage on the Beagle and see how this experience inspired him to devote the ... Full description.
Grade level: High (9-12)
Resource type: Guide for instructor, Lesson plan
Subject: Biology, History and philosophy of science
 
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National Science Education Standards (NSES): Read
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This information will introduce students to Darwin's model of natural selection in the same way that they learned about Paley and Lamarck. First, they will read an excerpt from Origin of Species and answer questions about it. Then, they will have an opportunity to consider the example of artificial selection (like pigeons or dogs) and think about how this process relates to Darwin's argument. Finally, ... Full description.
Grade level: High (9-12), College (13-14)
Resource type: Classroom activity, Guide for instructor
Subject: Biology, History and philosophy of science
 
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Educational standards associated with this resource:
National Science Education Standards (NSES): Read
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