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Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Amber | hard translucent fossilized resin produced by extinct coniferous trees of the Tertiary period, typically yellowish in color.
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| Fossil | the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.
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| Cast | an object made by shaping molten metal or similar material in a mold
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| Index Fossil | a fossil that is useful for dating and correlating the strata in which it is found.
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| Mold | a hollow container used to give shape to molten or hot liquid material (such as wax or metal) when it cools and hardens.
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| Permineralization | a process of fossilization in which mineral deposits form internal casts of organisms
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| Trace fossil | a fossil of a footprint, trail, burrow, or other trace of an animal rather than of the animal itself.
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| Cross-cutting Relationships | an igneous intrusion is always younger than the rock it cuts across
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| Geologic time | a system of chronological measurement that relates stratigraphy to time,
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| Lateral Continuity | states that layers of sediment initially extend laterally in all directions; in other words, they are laterally continuous
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| Original horizontality | states that layers of sediment are originally deposited horizontally under the action of gravity
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| Relative Age | common practice for dating rocks and strata
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| Half-life | the time taken for the radioactivity of a specified isotope to fall to half its original value
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| Ice core | is a core sample that is typically removed from an ice sheet
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| Isotope | each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei,
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| Radiometric dating | a method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.
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| Differentiation | the action or process of differentiating.
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| Outgassing | release or give off as a gas or vapor.
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| Supercontinent | each of several large landmasses thought to have divided to form the present continents in the geological past.
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| Pangaea | a hypothetical supercontinent that included all current land masses
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| Orogeny | a process in which a section of the earth's crust is folded and deformed by lateral compression to form a mountain range.
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| Evolution | the gradual development of something, especially from a simple to a more complex form.
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| Natural Selection | the process whereby organisms better adapted to their environment tend to survive and produce more offspring
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