1. What was the composition of Earth’s atmosphere shortly after its formation?

2. What is the current atmospheric composition?

3. What caused the changes in atmospheric conditions? How did life on earth
first develop?

4. How do we know that this is likely how life formed? Introduce the idea of
the Miller-Urey Experiment

Which was not a reason why canals were built in florida

Ascientist is designing an investigation to study the impact of invasive bird populations on local, native bird populations at backyard bird feeders. what population is most likely to be a control group for the investigation? amount of food number of bird feeders invasive bird populations local backyard birdfeeders without food

Which of your fossils are most likely heterotrophs? which of them are autotrophs? how do you know?