WorksheetsUnit 5 Earth's Living History Vocabulary Practice
Total questions: 13
Worksheet time: 7mins
The preserved remains of a living thing
fossil
mold
cast
A model of an organism that formed when sediments fill a mold and hardens
fossil
cast
mold
An impression of an organism formed when sediment hardens around the organism
fossil
cast
mold
Scientists who study fossils
ecologists
paleontologists
environmentalists
Index fossils
can tell the exact age of a rock layer
can identify the relative age of a rock layer
were present in the Age of the dinosaurs
Occurs when many species die out at the same time
index fossils
drought
mass extinction
A giant continent that existed in Earth's past
Africa
Pangaea
Asia
A geologic chart that divides Earth's history into units
epochs
geologic time scale
milleniums
All of the fossils in Earth's rock layers
trace fossils
fossil record
trilobites
Precambrian Time
First life on Earth - 4,600 - 542 million years ago (mya)
Age of Fishes - 542 - 299 million years ago (mya)
Age of Dinosaurs - 251 - 146 million years ago (mya)
Age of Mamals - m illion years ago - Present
Paleozoic Era
First life on Earth - 4,600 - 542 million years ago (mya)
Age of Fishes - 542 - 299 million years ago (mya)
Age of Dinosaurs - 251 - 146 million years ago (mya)
Age of Mammals - million years ago - Present
Mesozoic Era
First life on Earth - 4,600 - 542 million years ago (mya)
Age of Fishes - 542 - 299 million years ago (mya)
Age of Dinosaurs - 251 - 146 million years ago (mya)
Age of Mammals - million years ago - Present
Cenozoic Era
First life on Earth - 4,600 - 542 million years ago (mya)
Age of Fishes - 542 - 299 million years ago (mya)
Age of Dinosaurs - 251 - 146 million years ago (mya)
Age of Mammals - million years ago - Present
