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| Traces or remains of living things from long ago are |
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| Fossils that were common during a certain span of time and helped to determine the age of rocks and rock layers are |
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| The actual bodies or body parts or organisms are |
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| A tubular sample that shows layers of ice and snow built up over thousands of years is a(n) |
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| The age of an object or event in relation to other objects or events is |
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| The atual age of an event or object is |
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| The amount of time it takes a radioactive element to decay by 50% is called |
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| James Hutton's theory that the same forces at work today were at work in the past was caled the theory of ______________ |
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| Earth's History divided into intervals of time defined by major events or changes on Earth is |
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| Fossils can only form when |
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| What are the three substances that can preserve original remains |
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| What are the earliest known fossils found on Earth |
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| What type of rock are fossils most commonly found in |
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| Why are fossils not found in igneous rock |
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Definition
| It's to hot. The fossils would melt |
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| Scientists study sedimentary rock to determine |
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| Define the difference between relative age and absolute age |
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Definition
Relative age is estimated
Absolute age is the actual age |
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| What can scientis determine by studying tree rings |
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Definition
| How old the tree is; Weather patterns |
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| What can scientists determine by studying ice cores |
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| The powder left behind when a mineral is scraped across a porcelain tile is |
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| What do scientists use to determine hardness |
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| The way in which light reflects from a mineral's surface is it's |
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| The tendency of a mineral to break along flat surfaces is called |
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| The tendency of a mineral to break into irregular pieces is called |
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| The amount of mass in a given volume of a substance |
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| A minerals resistance to being scratched is its |
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| Molten rock inside the Earth is called |
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| Molten rock that reaches Earths surface is called |
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| Rock that contains enough of a mineral to be mined for a profit is |
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| What are 2 types of mining |
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| What are the 4 characteristics of a mineral |
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| Solid, Made in Nature, Crystal structure, and definate chemical makeup |
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| In what layer of Earth are all rock-forming minerals |
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| What is the most common group of minerals |
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| What is a naturally formed solid that is usually made up of one or more minerals |
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| What is the process that forms changes and breaks down rock |
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| What forms when molten rock cools and becomes a solid |
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| What forms when pieces of older rocks, plants, and other loose materials get pressed or cemented together |
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| What forms when heat or pressure causes older rocks to change into new types of rock |
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| What are materials that settle out of water or air. |
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| What is the process in which an exsisting rock is changed by heat or pressure |
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| What is the process in which atoms join together differently as new bonds form |
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| What is an arrangement of minerals in a flat, wavy, or parallel bands |
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Term
| Explain the difference between an intrusive and extrusive igneous rock |
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Definition
Intrusive- forms from magma
Extrusive- forms from lava |
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Term
| Where does the rock cycle begin and end |
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Definition
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Term
| Why do some igneous rocks have large crystals and some have small |
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Definition
| Not enough space. Large crystals have a little time to cool, where as Smaller crystals have a longer time. |
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| What sedimentary rock forms from the remains of ancient plants that have been buried and pressed together |
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| What sedimentary rock forms in caves due to evaporate and when sea shells are cemented together. |
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| What mineral is formed in the shels and skeletons of ocean organisms |
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| What is the most common of rock no Earth's surface. |
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