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Fossils unit test
| Question | Answer |
|---|---|
| The preserved remains or traces of living things are called ______ | fossils |
| Fossils that are made out of minerals that have turned to stone are called ______ | petrified fossils |
| A copy of the shape of an organism is what type of fossil? | cast fossil |
| _____ is the hard resin, or sap, of evergreen trees | amber |
| three ways entire organisms can be preserved are ______ | amber, tar, or ice |
| A hollow area of sediment in the shape of an organism is called a _____ | mold |
| the evolutionary process of an organism changing to become better suited to survive in it's environment is called ____ | adaption |
| _______ provide evidence of the activity of ancient organisms. | trace fossils |
| organisms that no longer exist on the planet are said to be _____ | extinct |
| this law states that the oldest rock layer is found at the bottom and the youngest at the top. | Law of Superposition |
| The rock layer of 250 million years old. This describes the _______ of the rock | absolute age |
| The Law of Original Horizontality states that all rock layers are laid down _____ | flat |
| The statement that the rock layer is younger than the 100 million year old extrusion but older than the 50 million year old intrusion is an example of ______ | relative age |
| Rock layers with a wavy line at the top represent ______ | erosion |
| Intrusions are always _____ than the rock layers they are found in. | younger |
| a _____ is a break or crack in the earth's crust along which rocks move. | fault |
| fossils of widely distributed organisms that lived for only a short period of time are called ______ | index fossils |
| the gradual change in living things over long periods of time is called ______ | evolution |
| The history of life on earth on a calendar is called the ______ | geologic time scale |
| In what time in Earth's history was the earth's atmosphere formed? | Precambrian |
| List possible causes of mass extinctions in Earth's past or possibly the future. | asteroids, volcanoes, human impact |
| Magma found within a rock layer is called an ________ | intrusion |
| The youngest layer of the rock will always be at the ____ | top |
| we live in what era of earth's history? | Cenozoic |
| magma that flows onto the surface of a rock layer is called an _______ | extrusion |
| What are 3 things humans are doing today that can result in the extinction of a species? | overpopulation, pollution, deforestation |
| Whatever the actual cause of a mass extinction, it usually results in the Earth's _______ changing, killing off the organisms that live there. | climate |
| This occurs in rick layers when unequal forces within the earth pushes up in one area. | tilting |
| Earth's time scale dates back as far as _______ years ago. | 4.6 billion |
| Where are MOST fossils preserved? | sedimentary rock |
| The most important step that has to occur for an organism to become a fossil is ___ | to be buried in sediment |
| Which parts of an organism are most likely to be preserved as a fossil? | |
| What important event happened 2.5 billion years ago when some organisms began using photosynthesis to make their food? | Formed the earth's atmosphere |
Created by:
ZoeyGirl13
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