You have invented a time machine! You go back in time to the Carboniferous period and see some medium-sized vertebrates roaming around on land eating plant material. Considering the time period, these are most likely to be 1. _____________ . You move on in time to the late Permian and you happen to land on the Laurasia landmass (the continents of the Northern Hemisphere). You are in a wet, swampy like environment. You run across some large vertebrates that look lizard-like. Considering the time period and location, these are likely to be 2. ____________________ . You move on in time to the early Triassic period, landing on the Gondwana landmass (the continents of the Southern Hemisphere) in a drier environment. Now the vertebrates have changed. There are some small dinosaurs, but also another type of vertebrate with sprawling limb posture and canines. These are likely to be 3. ________________. Finally, you make it past the Cretaceous period. What group of vertebrates are you likely to see now because they have become more dominant? 4. ____________________

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