A Brief History of Life on Earth In this activity, you will create a card that describes one of the seminal events in the history of life on Earth. You will then connect your card to a timeline of Earth history, attaching it in the appropriate location. Events: ● ● ● ● ● ● ● ● ● ● ● ● ● Formation of the Moon End of the Heavy Bombardment Snowball Earth Possible Origin of Life Origin of photosynthesis Origin of Cellular Respiration Eukaryotes first appear Evolution of multicellularity The Cambrian Explosion Origin of animals Origin of Fungi Origin of plants Origin of pines ● ● ● ● ● ● ● ● ● ● ● Origin of flowering plants Origin of fish Origin of insects Origin of tetrapods Origin of amphibians Origin of reptiles Origin of mammals Origin of birds Origin of Anatomically Modern Humans The Permian Mass Extinction The Cretaceous Mass Extinction Card Directions: Front: ● Name of event. ● Geological date of event (How long ago did it happen?) ● A picture that you think appropriately represents your event. If you use artwork from somewhere else, include a source. Back: ● A description of the event, and why it was important for life. ● A description of the evidence that supports scientific thinking about the event. ● Discussion of any ambiguous aspects of the event, or “missing” pieces of the picture. You will attach your card to a clothespin, and secure your event to the timeline in the appropriate location (if your event spans a region of time, indicate that on your card, but place it at the earliest date in the timespan). The timeline will be 46 meters in length, with present time being on the right of the timeline as you face it. Determine where you will need to place your card PRIOR to coming to class on Monday to place it. Hint: How old is planet earth? How could you compare that scale to our timeline length?
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