1. Turn your timeline into the box. Quick Write: Geologist and astronomers have shown that the Earth came into existence approximately 4.5 billion years ago (4,500,000,000) Using a scale where 1cm=1million years, how long would a timeline need to be to show the earths history. Hint: Give your answer in terms of meters 11/7 A Long Time Ago Lesson #42 Todays Plan: -Geological timeline -Reflections Reminders: -Retakes today at lunch.

2. We will go into the commons to look at a model of the history of the earth. –Remain quite unless called upon to answer a question. –Focus on the activity and information provided. When we return you will answer reflection questions. –You may bring your journal and a pencil to take notes. Think about the similarities and differences to your timeline Note anything that impresses you about Earths timeline 11/7 A Long Time Ago Lesson #42

3. Earth timeline reflection What was the one thing that impressed you about the timeline? How is the earth timeline like your own personal timeline? How is it different? Why do you think we know more about the Earths recent history than we do about its early history? 11/7 A Long Time Ago Lesson #42

4. Reading Page 76-78 Fossils, Rocks and Time Respond to the questions p.78 11/7 A Long Time Ago Lesson #42