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1. The inside of the earth would look like several different layers, all different in appearance, and with some of them moving like a liquid.
5. The Earth's mantle is made up of rock containing silicon, iron, magnesium, aluminum, oxygen and other minerals. The crust of the earth is made up of mostly oxygen, silicon, aluminum, iron, calcium, sodium, potassium and magnesium. The cores are made of mostly nickel and iron.
B. Geological Time
6. Pre Cambrian period, Cambrian period, Ordovician period, Silurian period, Devonian period, Carboniferous period (consisting of the Mississippian period and Pennsylvanian period), Permian period, Triassic period, Jurassic period, Cretaceous period, Paleogene period, Neogene period, and then the current period, the Quaternary period.
7. Cambrian-550 million years ago
Ordovician-480 million years ago
Silurian-440 million years ago
Devonian-420 million years ago
Mississippian-351 million years ago (and also Carboniferous period)
Pennsylvanian-325 million years ago
Permian-290 million years ago
Triassic-249 million years ago
Jurassic-205 million years ago
Cretaceous-145 million years ago
Paleogene-50 million years ago
Neogene-25 million years ago
Quaternary-1.8 million years ago
8. Cambrian-First fishes and chordates
Ordovician-Metazoan fish diversify out of the blue
Silurian-First vascular land plants
Devonian-First amphibians and the diversity of jawed fishes
Carboniferous (Mississippian and Pennsylvanian)-First reptiles, seed ferns, and scale trees
Permian-Major extinctions, the reptiles diversify
Triassic-The first mammals and dinosaurs appear
Jurassic-The first birds appear and the dinosaurs diversify
Cretaceous-The dinosaurs become extinct, primate appear, as well as flowering plants
Paleogene and Neogene-Mammals diversify
Quaternary-The evolution of humans
9.
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