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 ENGAGE AND EXPLOREEarthViewer is an application that is available for computers from HHMI or it can be installed on tablet devices (iPad or Android).Launch and explore the features of EarthViewer:Click “Ancient Earth” on the bottom of the left column. Click, hold, and drag to rotate the planet.Click, hold, and drag down the horizontal silver slider on the timeline; watch what happens to the planet and the data indicators as you move backward and forward in time.Position the silver timeline slider at 0 MYA (top of the timeline). Click on the left "play" button at the bottom of the timeline; watch what happens. When the silver bar stops at the bottom, click on the right "play" button and watch again.Position the silver timeline slider at 0 MYA. Click on "Charts" at the bottom of the screen.Click “CHARTS”. Choose a chart. Now click on the left "play" button at the bottom of the timeline. Watch what happens on your chosen chart as the slider moves down the timeline.Click "pause" before the slider reaches the bottom of the timeline. Note that your chosen chart will show a demarcation in the data for that point in time.Close your chart in EarthViewer by clicking on the "X" in the upper right-hand corner.Select “VIEW” to display different types of information such as fossils, impact events, cities, geologic events, and biological events. Select “Biological Events”.Click and drag the silver slider to one of the green arrows. The name of the event will appear in a bubble. Click on the name of the event. A box with information about the event will appear. Close the box by clicking the “X”.A. Paleo Earth→ Click on Paleo Earth in the left column.Over the last 540 million years, icecaps covered at least one of the Earth’s poles during three intervals.When were those intervals? Use the CHART button to find an approximate temperature range for the three intervals. Use the CHART button to find an approximate temperature range for the three intervals. 1.2.3.B. Ancient Earth→ Click back to “Ancient Earth” to view all of Earth History.What did the planet look like when global temperatures were less than 5 °C? (hint: average global temperatures can be found using the CHART feature.) → Tap “VIEW” and select “Geologic Events”, tap on the flag that opens on the timeline at 2200 million years ago. What are these events called?How do they start?How do they end? → Below is the chart of Oxygen. Double Click on it chart to open the drawing screen. This will allow you to add text, lines, etc to the chart. To change the color of the text, click the 3 dots on the right and select text color.Open the drawing and mark the following:Geologic Events in Brown:Great Oxygenation, Snowball Earth, Snowball Glaciations, Oxygen IncreaseBiological Events in Green:First Eukaryote, Oldest Life, Chloroplast, First Land PlantsFrom the chart above, pick the 3 events that had the largest impact on Oxygen levels on Earth.Event NameTime (mya)Open the text on EarthViewer about the event and summarize the passage.Explain why this event may have changed the Oxygen levels.1.2.3.Open the drawing and mark the following:Geologic Events in Brown: Great Oxygenation, Snowball Earth, Snowball Glaciations, Oxygen IncreaseBiological Events in Green: First Eukaryote, Oldest Life, Chloroplast, First Land PlantsFrom the chart above, pick the 3 events that had the largest impact on Carbon Dioxide levels on Earth.Event NameTime (mya)Open the text on EarthViewer about the event and summarize the passage.Explain why this event may have changed the Carbon Dioxide levels.1.2.3.C. Modern Earth→ Click “Warming Earth” to view only the last 100 years.What do the colors on the globe represent?What was the average global temperature for the period 1951-1980?Based on the temperature chart, how much has the Earth warmed in the last 100 years?→ Click through each of the charts and describe the trend in relation to temperature. Example: % Oxygen in the atmosphere has remained constant as the temperature has increased. Carbon DioxideDay LengthLuminosityBiodiversity ................
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