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Geology Word Puzzle

Teacher: Mrs. Moser
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Across
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The first amphibians began to evolve from this fish
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The time it takes for half of radioactive atoms to decay
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The maga cools and hardens into a mass of igneous rock
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Over time elements break down or decay by releasing particles and energy
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A record of the life forms and geological events in earth's history
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A solid copy of an organism
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A group of hard shelled animals that evolved 500 million years ago. Ex: turtles
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All the organisms evolved in this era and they all lived in the sea
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Fossils and rocks formed at this time
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Earth's continents moved to form a supercontinent
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Many types of organisms or living things become extinct at the same time
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A type of rock that is made of hardened sediment
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The time period where life appeared on Earth
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All plants and animals contain this and it is a radioactive form of carbon it is used to date fossils and animals back
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When all the atoms of a particular type of matter are the same
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It was 225 million years ago and this is when the first dinosaurs appeared
Down
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The preserved remains of living things. Ex: bones from dinosaurs, rocks from millions of years ago.
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Scientists had a hypothesis that Earth formed at the sam time as the planet and the sun
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To determine the relative ages of sedimentary rock layers
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The first vertebrates
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Provides evidence about the history of life on Earth and shows groups of organisms that have changed overtime
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Lava that hardens on the surface
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All matter you see including rocks and is made up of tiny little particles Ex: proton and neutron.
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A break in Earths surface
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Scientist who study fossils
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Provide evidence of the activities of ancient organisms Ex: tracks, burrows, eggshells
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Animals that have scaly skin and are cold blooded Ex: turtles, snakes, alligators, and lizards.
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Is a hollow area in sediment in the shape of an organism or part of an organism
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Eras that are divided into units of geological time
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Geologists divide this into three times Paleozoic, Mesozoic, and Cenozoic