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L!aM's StuDy gu!De
science midterm test StuDy Gu!De
| question | answer. |
|---|---|
| explain uniformatarianism | The theory of gradual geologic change. |
| what type of scientist studies plants | a botanist |
| What are the two types of minerals? | silicate and nonsilicate |
| What is the color of a minerals powder? | streak |
| splitting a mineral on a smoth surface is called... | cleavage |
| The way a mineral reflects light is called | luster |
| when a mineral breaks on a curved or irregular surface is called... | fracture |
| To find a streak, you rub a mineral along a... | streak plate |
| The measure of a mineral's ability to resist scratching is what? | hardness |
| the hardest mineral of all. | diamond |
| the softest mineral of all. | Talc |
| Ability of a mineral to glow under ultraviolet light. | flourescence |
| Ability to "fizz" when covered in acid | chemical reaction |
| Ability to cause a double image. | optical properties |
| Ability to attract metal. | magnetism |
| minerals that contain uranium or radium. | radioactivity |
| largest unit of time. | eon |
| unit of geologic time including two or more periods. | era |
| unit of time in which eras are divided. | period |
| subdivision of ageologic period | epoch |
| The death of allmembers of a species. | extinction |
| Method of dividing earth's time into managable intervals. | geologic time scale. |
| Theory stating that geologic change happens suddenly. | catastrophism |
| states that older rocks leigh under younger rocks. | superposition |
| study of past life. | paleontology |
| method of determining age in relation to something else. | relative dating |
| arrangement of rocks in which oldest is on the bottom. | geologic column |
| A break in the geologic column due to erosion or when sediment is not deposited for a long time. | unconformity |
| occurs when rock layers bend and buckle. | folding |
| Internal earth forces slant rocks. | tilting |
| Molten rock squeezes into existing rocks and cools to form... | intrusions |
| A break in earth crust. | fault |
| most common unconformity. | disconformity |
| horizontal rock layer that lay on top of an eroded surface. | nonconformity |
| horizontal layers or rock are tilted or folded | augular conformity |
| dating according to years | absolute dating |
| atom that has same number of protons but different number of neutrons. | isotope |
| half the time it takes for an element to decay | half life |
| Radio active isotope breaks down into a sable substance in... | radioactive decay |
| age determined by stable and unstable isotopes. | radiometric dating |
| Preserved remains of something that was once living | fossils |
| fossils animals left behind | trace fossils |
| sediments fill a mold to form a... | cast |
| cavity made in a sedimental surface | mold |
| Found in rock layers of only one geologic age | index fossil |
| naturally formed reoccurring solid | mineral |
| two or more elements together form a... | compound |
| cannot be broken by any chemical means | an element |
| solid whose atoms ions and molecules are arranged in a definite pattern. | crystal |
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L!aM:D
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