Announcement: Jeff Podos section starts today. NO final exam. Third and last exam is on
the last day of class.
Topics to be covered:
1. Ecology of plants and animals
2. Human impacts
• How old is the Earth?
o 4.5billion years old
• How long has there been life on Earth?
o 3.8 billion years
Ecology of plants and animals
• What do we see when we look at the natural world?
~10 million species on Ea