SW Science 10 Unit 6 Relative Dating Worksheet – Rowan County …
How does the period of human existence compare to the vastness of time? ES 1 Key Idea 1: The Earth and celestial phenomena can be described by principles of relative motion and perspective. Describe current theories about the origin of the universe and solar system. Earth’s early atmosphere formed as a result of the outgassing of water vapor, carbon dioxide, nitrogen, and lesser amounts of other gases from its interior. Earth’s oceans formed as a result of precipitation over millions of years. The presence of an early ocean is indicated by sedimentary rocks of marine origin, dating back about four billion years. The evolution of life caused dramatic changes in the composition of Earth’s atmosphere. Free oxygen did not form in the atmosphere until oxygen-producing organisms evolved.
Construct an explanation based on evidence for how geoscience processes have changed Earth’s surface at varying time and spatial scales. Teachers’ Lounge Purpose of Lesson: The purpose of this lesson is for students to be able to USE the geologic timelines to answer simple questions. Major Strategies to Watch for: Be able to read a geologic timeline.
The geologic time scale is used as a record of the major events and diversity of life forms present in Earth’s history Relative age and radioactive dating to find the absolute age.
How will the teacher assist students in organizing the knowledge gained in the lesson? This entire lesson is designed to assist students in organizing their knowledge of the geologic time scale. In addition, from the final product students will be able to put a story together regarding the history of Earth. Animals have changed over time as evidenced by the fossil record.
All animals and all living things have changed at different times and at different rates. Summative Assessment The activities in this lesson will lead to summative assessment and demonstrating mastery including: Students will be able to complete the pie chart that shows the proportion each of the segments of time represents in the entire age of the Earth.
Students will demonstrate their understanding of the organization and relationships of the Eras and Periods in the Geologic Time Scale by completing a thinking map. Students are able to make observations regarding the complexity of the fossils as we move through the geologic time scale from Precambrian Time to present and draw a conclusion based on their observations. Each of the 5 questions on the activity sheet is worth 20 points.
Formative Assessment The teacher will walk around, spot-check students’ work and ask probing questions if students are not progressing adequately.
Geologic Time Scale
Back to top Vocab Challenge Cards T. Tomm, Havana Junior High, Havana, IL I prepare several sets of these cards to give students a chance to review important terms from the dinosaur and fossil unit. I copy the cards on one side of cover stock and the answers or letters to match on the other. Once the students have matched all the cards, they can check their work by turning the cards over.
If the letters match, they are correct. If not, they know the ones they need to study!
• Define the terms: geologic formation, geologic cross-section, and stratigraphy. • Look at the stratigraphic diagram and explain where the reef was and which rocks in the Guadalupe Mountains correspond to these sections (reef is the massive limestone.
Dinosaurs disappeared about 65 million years ago. That corn cob found in an ancient Native American fire pit is 1, years old. How do scientists actually know these ages? Geologic age dating—assigning an age to materials—is an entire discipline of its own. In a way this field, called geochronology, is some of the purest detective work earth scientists do.
There are two basic approaches: Here is an easy-to understand analogy for your students:
Activity 7: Relative Dating
At the same time, it should reveal an example of pseudoscience which should be part of any effort to improve science literacy and critical thinking. Students are taken through a combination of some background information and interactive experiences, and checked frequently by questions to confirm understanding. The narrative includes concepts of isotopes, radioactive decay, half-life, mineral formation, age analyses, Fair Test questions , and isochrons.
The lesson can be used as a one-day team activity, individually in class, or as a self-teaching homework assignment. It is intended to either stand by itself, or to serve as a useful introduction to the very effective online interactive Virtual Age Dating Tutorial.
and Absolute Dating of Geologic Materials Objectives The learner will: 1. Understand the difference between relative dating and absolute dating techniques used to determine the age of geologic deposits. 2. Recognize some of the ways each dating technique may be used at Cave of the Winds or.
Graphs, charts, and images can be used to identify patterns in data. Hook 5 minutes As students settle down for the day’s lesson, I present the following video and ask, “How do we know that all of these events have happened? I follow up with the question, “Well, how do we know what happened before there were people to write things down? Explain 1 10 minutes I tell the students that today’s lesson will help them understand several big ideas that scientists use to determine the history of the Earth, and begin the following presentation.
Throughout the presentation, there are several opportunities for the students to Think-Pair-Share answers to the embedded questions. The Relative Age of Rocks Activity 1 5 minutes When we reach slide 6 of the presentation, I distribute the ” letter cards ” one set per table , and tell the students that their first task is to organize them in order, with oldest CT at the bottom.
I explain that “new letters” cannot just appear, there has to be something linking each of the cards to the next. I remind the students that as they are working, it is not enough to place the cards in the correct order, they must also be able to explain why they are placing each card in that particular order, and should be ready to explain their reasoning SP7. The order of the cards is: Law of Superposition Cards Explain 2 15 minutes I continue with the presentation slides , stopping for quick Think-Pair-Share , at each of the embedded questions.
By having several predetermined stopping points, I am able to give students time to interact with all these new concepts, and turn the presentation into a more interactive learning experience.
Geologic Timeline – Direct Instruction
No reproduction may be made without prior approval from the author Dr. Relative Dating of Geologic Cross-Sections: Cliffs, road cuts, and non-vegetated landscapes allow us glimpses into geology which is often hidden from view. Cliffs and road cuts are “side views” or “geologic cross-sections” of the topography which show the relative positions of various rock layers and structures at a given spot.
• The geologic time scale is a record of how Earth and its life forms have changed through time. For example, the scale shows when life ﬁrst appeared on Earth. • In the geologic time scale, time is divided into bigger blocks than years or centuries. The scale begins when.
NAGT’s mission is to support a diverse, inclusive, and thriving community of educators and education researchers to improve teaching and learning about the Earth. NAGT represents the collective voice of K teachers, college and university faculty, and informal educators in museums and science centers who share a vision to build geoscience expertise and an Earth-literate society through high-quality education.
We seek an exceptional Executive Director to build on past successes and to provide strategic leadership to guide NAGT toward new opportunities for growth. To learn more about the position and instructions to apply, visit this website. Titled, ” Making the first and last geoscience class count ,” the article calls attention to opportunities within introductory geoscience courses to address grand societal challenges that are rooted in the geosciences, thus helping students develop “an appreciation for the global perspective, cultural sensitivity and scientific insight that inform decisions regarding the challenges humans will face in the future.
Sean Fox, Carleton College Reuse:
Methods of Geological Dating: Numerical and Relative Dating
We often express time in hours or days, and 10 or 20 years certainly feels like a long time. Imagine if you needed to think about one million, million, or even several billion years. The Earth is 4. Have places like the Grand Canyon and the Mississippi River been around for all of those years, or were they formed more recently? When did the giant Rocky Mountains form and when did dinosaurs walk the Earth? To answer these questions, you have to think about times that were millions or billions of years ago.
A time span on the geologic time scale between the Precambrian and Mesozoic eras. Period A basic unit of the geologic time scale that is a subdivision of an era.
Volcanic time markers – a layer of volcanic dust covering layers. When a violent eruption of a volcano occurs it may send dust high into the atmosphere where it can spread over the entire planet. It settles out of the air and forms a layer over wide regions at the same time. Asteroid impacts can have the same effect. The remians of the impact site in Mexico as seen by satellite imagery.
Ways of Measuring Absolute Time Tree rings- every year a tree grows a new ring. When the tree dies, the rings can be counted and events such as forest fires can be dated. Evidence of the same fire may be seen as a layer of ash in the rocks to correlate a rock layer with the tree rings. Tree rings can be used to date events up to years ago. Some lakes have seasonal deposits ex..
Crossbedded varves in loose glacial deposits. One “half-life” of time has passed when exactly half of the element remains. Half lives differ from element to element.