3. Earth's Geologic timeline.docx

EARTH AND LIFE SCIENCE  – ORIGIN AND STRUCTURE OF THE EARTH CONTENT

The properties of Earth: Geologic timeline

CONTENT STANDARDS

The learners demonstrate an understanding of:

PERFORMANCE STANDARD

1. The properties of earth necessary to support life The learners shall be able to:

LEARNING COMPETENCIES

1. conduct a survey to assess the possible geologic hazards that your community may experience. (Note: Select this performance standard if your school is in an area near faultlines, volcanoes, and steep slope The learners shall be able to: 1. recognize the uniqueness of Earth, being the o nly planet in the solar system with properties necessary to support life

SPECIFIC LEARNING LEARNING OUTCOMES

At the end of the lesson, the the learners will be be able to:

TIME ALLOTMENT

1. describe how Earth’s history can be interpreted from the geologic time scale 2. recognize the uniqueness of Earth, being the o nly planet in the solar system with properties necessary to support life 3. Display scientific values and attitudes 4. Devise ways to facilitate own learning 1 hour

PROCEDURE

MEETING THE STUDENTS’ NEED

VI. INTRODUCTION Communicate learning objectives:    

Students will describe Earth’s history interpreted from the geologic time scale Students will recognize the properties of Earth necessary to support lif e. Students will utilize the Internet and library resources to research their assigned topic. Students will enhance their presentation skills

Review 

Students will briefly narrate their previous lesson.

VII. MOTIVATION Story telling. Students will make a story out of the picture presented. This will give students the opportunity to think and express their own ideas.

VIII. INSTRUCTION Review the standard clock. Let the students identify and describe the Second Hand, Minute Hand and Hour hand. 

Figure 1. Picture to be used during motivation

TEACHER TIPS: Materials to be used: Standard clock A clock of eras chart A blank or non-colored chart An arrow to use as the han on the clock of Eras Labels for the Eras (color-coded) Use the printable version of clock o f eras chart from http://www.fossils-facts-and 

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Demonstrate the Clock of Eras. Key Concepts It shows time that has already passed. It shows the time that has passed since the Earth was f ormed. The intervals show us time periods when the Earth looked a certain way and certain animals and pl ants lived on it. The Earth has not always looked the way it does now. For each turn of the Clock or Eras, students will describe each picture that represents different era

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Let the students discuss the geologic time scale. Have them answer the following guide questions: Describe what happened during the Precambrian period. o Why is Cenozoic era called the age of mammals, Mesozoic era the age of dinosaurs, and the o Paleozoic era the age of ancient life? After studying geologic time, let students answer the question: “ Is a 100 year -old person “old” and 1000 year-old artifact ancient? Justify your answer.

finds.com/earth_science_lesson_plans_on_geologic_time_introductio n.html figure 2. Surface of the Earth during Hadean Era

Figure 3. Artist’s impression of the landscape during the early Archean

Figure 4. The Proterozoic sea

IX. Practice Divide the class into two groups. Group 1 will make a string timeline using strings and event cards. 

TEACHER tips: Teacher will provide the distance table while let students make the event cards for the timeline.

Group 2 will make a Flowchart Fun. Students will create their own posters with flowcharts explaining how the oxygen made by bacteria lead to the ozone layer, plants and animals colonizing the land, and eventually our own evolution. X. EVALUATION (4 minutes) Short quiz. TRUE or FALSE 1. The Earth is thousands of millions of years old. 2. Oxygen has been in o ur atmospheres since the Earth first formed. 3. Animals colonized the land before the plants did. 4. The first life on Earth was plants 5. The first animals with backbones were fish. 6. Modern humans have only been around for 6, 000 years 

Answers of the quiz 1. true 2. false 3. false 4. false 5. true 6. false