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Geology Word Puzzle

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