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As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils.

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By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils.

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by the end of the era fossil evidence reveals the first large sophisticated reptiles and the first modern plants.

# data[].attributes.body
the geologic time scale was developed after scientists discovered and observed fossils

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Dinosaurs and other prehistoric animals existed at that time.

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The fossils tell us that During the Paleozoic era, many organisms went extinct and many came into life.Some organisms like reptiles and amphibians were introduced in this time era and we know this because of the fossils.

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The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils.

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks.

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks.

# data[].attributes.body
By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

section

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As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils.

# data[].attributes.body
By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks

# data[].attributes.body
The fossil record supports a theory of plate tectonics now widely accepted. At the start of the Mesozoic, nearly all of Earth's land is believed to have been united in a single supercontinent called Pangaea.

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During the late Paleozoic, great forests of primitive plants thrived on land; these would form the great coal beds of Europe and eastern North America. By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites

# data[].attributes.body
By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
the geologic time scale was developed after scientists discovered and observed fossils

# data[].attributes.body
Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossil

# data[].attributes.body
During the late Paleozoic, great forests of primitive plants thrived on land; these would form the great coal beds of Europe and eastern North America. By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossil

# data[].attributes.body
During the late Paleozoic, great forests of primitive plants thrived on land; these would form the great coal beds of Europe and eastern North America. By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils.

# data[].attributes.body
By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants.

# data[].attributes.body
As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites

# data[].attributes.body
By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
the geologic time scale was developed after scientists discovered and observed fossils

# data[].attributes.body
As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils.

# data[].attributes.body
by the end of the paleozoic era, fossils were buried underground which reveals evidence of how this happened

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils.

# data[].attributes.body
By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
The geologic time scale developed through observed changes in the fossils going from oldest to youngest sedimentary rocks.

# data[].attributes.body
The fossil record supports a theory of plate tectonics now widely accepted.

# data[].attributes.body
By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks.

# data[].attributes.body
Climate change, sea levels, all of earths problems still happening today

# data[].attributes.body
By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks.

# data[].attributes.body
fossil evidence reveals that primitive/early plants thrived on land, and by the end of the paleozoic era, the first fossils of modern plants and large, sophisticated reptiles were observed

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it was developed when scientists saw that fossils varied from oldest to youngest sedimentery rocks

# data[].attributes.body
They reveal the first large sophisticated living things

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils.

# data[].attributes.body
By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils.

# data[].attributes.body
By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
the geologic time scale was developed after scientists discovered and observed fossils

# data[].attributes.body
As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils.

# data[].attributes.body
During the late Paleozoic, great forests of primitive plants thrived on land; these would form the great coal beds of Europe and eastern North America. By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils

# data[].attributes.body
During the late Paleozoic, great forests of primitive plants thrived on land; these would form the great coal beds of Europe and eastern North America. By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
By the end of the era fossil evidence reveals the first large sophisticated reptiles and the first modern plants.

# data[].attributes.body
Common fossils from the Mesozoic time period include dinosaur bones and teeth, and diverse plant fossils.

# data[].attributes.body
The geologic time scale was made after scientist were observed fossils

# data[].attributes.body
By the end of the Paleozoic era, fossils were buried underground which reveals evidence of how this happened.

# data[].attributes.body
The geological time scale was developed after scientist discovered and observed fossils.

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils

# data[].attributes.body
By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth

# data[].attributes.body
The largest extinction in Earth's history marked the end of the Permian period, some 252 million years ago

# data[].attributes.body
As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils.

# data[].attributes.body
During the late Paleozoic, great forests of primitive plants thrived on land; these would form the great coal beds of Europe and eastern North America. By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils.

# data[].attributes.body
By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
the gelegoic time scale was made after scientist discvored and observed fosslis

# data[].attributes.body
The geologic time scale was developed by studying rock layers and index fossil worldwide.

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils.

# data[].attributes.body
As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils.

# data[].attributes.body
By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils.

# data[].attributes.body
By the end of the era, the fossil evidence reveals the first large, sophisticated reptiles and the first modern plants (conifers).

# data[].attributes.body
As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils.

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
The geologic time scale was developed after scientists observed changes in the fossils going from oldest to youngest sedimentary rocks. They used relative dating to divide Earth's past in several chunks of time when similar organisms were on Earth.

# data[].attributes.body
As climate changed, sea levels rose world-wide and seas expanded across the center of North America. Large marine reptiles such as plesiosaurs, along with the coiled-shell ammonites, flourished in these seas. Common Mesozoic fossils include dinosaur bones and teeth, and diverse plant fossils.