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Fossils And Volcanoes Crossword Puzzle

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Fossils and Volcanoes

        8           9               10        
            12                     13          
15   16                                        
Across Down
3 mountains that form as continental crust crumble and bend into folds
4 magma that has reached Earth's surface
5 the idea that Earth is always changing, the same forces of change are at work today and at work in the past
6 traces or remains of living things from long ago
7 actual age of an event or object
8 divides Earth's history into intervals of time defined by major events or changes on Earth
12 fossils that are the actual bodies or body parts of organisms
14 fossils of organisms that were common, lived in many areas and existed only during specific spans of time
15 dense cloud of super hot gases and rock fragments that races down hill
17 a rapid downhill movement of rock and soil
18 a tubular sample that shows the layers of snow and ice that have built up over thousands of years
19 water that shoots into the air
1 the length of time it takes for half of the atoms in a sample of a radioactive element to charge from an unstable form into another form
2 contain holes and tunnels left by escaping gases
3 mountains that form as blocks of rock move up or down along normal fault
9 one of the best preserves of the remains of prehistoric life
10 made up of rock fragments less than 2 mm in diameter
11 an opening in Earth's crust through which molten rock, rock fragments, and hot gases erupt
13 rain that contains large amounts of acid
16 an age of event or object in relation to other events or objects
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