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Earth's History

Earth's History Vocabulary Card

extinct The dinosaurs became extinct.
fossil Dinosaur fossils are in the museum.
continent Asia, North America, and Africa are examples of continents.
evolve Life on earth has evolved. In the beginning there was one-celled organisms. Now, there are humans.
atmosphere There is life on earth because oxygen is in the atmosphere.
tectonic plate The tectonic plates move a few centimeters each year.
era The dinosaurs lived during the Mesozoic era.
evidence Fossils are evidence for what lived in the past.
MYA BYA The dinosaurs lived millions of years ago. The earth was formed 4.6 billion years ago.
impact Single celled organisms had an impact on the atmosphere. They added more oxygen.
drift South America and Africa drifted apart.
molten material There is molten material under the earth.
liquid Water is a liquid.
volcano The volcano is dangerous when it erupts.
blue-green algae Blue-green algae gave the earth’s atmosphere oxygen.
rainforest The rainforests give us oxygen.



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