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What is relative dating in geology?
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Layers or sediment are generally deposited in a horizontal position is known as the..?
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Quiz Science 425
| Question | Answer |
|---|---|
| What is relative dating in geology? | placing of rocks or events in proper sequence |
| Layers or sediment are generally deposited in a horizontal position is known as the..? | principle of original horizontality |
| Geologic features that cut across rocks must form after the rocks that they cut through is...? | principle of cross-cutting |
| What general term denotes any buried, erosional surface where rock layers are missing? | unconformity |
| What type of fossil is created by mineral-rich water precipitating out into pore spaces | permineralization |
| A fossil that allows rock’s age to be pinpointed accurately and correlated with other beds.. | is an index fossil |
| What is an isotope? | an atom of a given element with a varying number of neutrons |
| How is absolute dating measured? | Radiometric Dating |
| What is the half-life of a radioactive element? | the amount of time for 1/2 of the parent isotopes to decay |
| When did the Phanerozoic Eon begin? | 542 million years ago |
| The first elements to form after "Big Bang" were ________. | helium and hydrogen |
| Early Earth was hot because ________. | collisions and radioactive decay produced heat |
| Which one of the following represents the greatest expanse of geological time? | Precambrian |
| Earth's primitive atmosphere evolved from gases ________. | expelled from within the earth |
| The most common Precambrian fossils are ________, layered mounds of calcium carbonate. | stromatolites |
| The process in which plants use light energy to synthesize food sugars from carbon dioxide is ? | photosynthesis |
| The beginning of the Phanerozoic is marked by the ________. | development of hard body parts, such as shells and bones |
| The largest mass extinction in the Phanerozoic occurred in the ________ period. | Permian |
| The supercontinent of Pangaea began to break up during the ________ era. | Mesozoic |
| A major obstacle the first land plants had to overcome was ________. | staying upright despite gravity and wind on land |
| The first fully land-based animals were ________. | reptiles |
| Mammals became the dominant land animals during the ________ era. | Cenozoic |
| The oceans cover approximately ________ percent of Earth's surface. | 71-74 |
| ________ develop where oceanic lithosphere bends downward and sinks into the mantle. | Deep Ocean Trenches |
| Which one of the following is not part of the continental margin? Shelf, Slope, Rise, or Trench? | Trench |
| The continental rise is located ________. | between an abyssal plain and continental slope |
| A passive continental margin will have which of the following features? | Continental Shelf |
| An active continental margin will have what features? | Continental Slope, Accretionary Wedge, Ocean Trench |
| Subduction of oceanic lithosphere at the trenches can act like a bulldozer to produce ________. | An Accretionary Wedge |
| The crests of mid-oceanic ridges contain ________. | Active Rift Zones |
| The seafloor spreading process at ridges produces what kind of faults? | Normal Faults |
| Sediments derived primarily from the products of weathering on the continents are called _____. | Terrigenous Sediment |
| Manganese nodules are an example of ________. | Hydrogenous Sediment |
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NMay2