Term
| --- are the remains of a once living thing that has been preserved |
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Definition
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Term
| --- would be most likely to form a fossil |
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Definition
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Term
| --- can preserve a whole plant or animal as a fossil |
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Definition
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Term
| A --- is the imprint left by the outside of aplant or animal. |
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Definition
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Term
A --- fossil shows how
long-dead animals changed their environment. |
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Definition
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Term
| A --- would be an example of a trace fossil. |
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Definition
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Term
| A --- is formed when minerals that fill a mold and have the same shape as the original living thing. |
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Definition
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Term
| --- fossils are formed by minerals that have taken the place of once-living material. |
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Definition
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Term
| What would probably form a petrified fossil? |
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Definition
| a tree buried in a mineral hot spring |
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Term
A type of fossil that is made mostly of carbon
is called ---. |
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Definition
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Term
| --- --- are any fuel that was formed from the remains of once-living organisms |
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Definition
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Term
| Fossil fuels are found in --- rock. |
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Definition
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Term
The fossil fuels are
---, ---, and ---. |
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Definition
coal, petroleum
and natural gas |
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Term
| --- was formed when microrganisms died and fell to the bottom of ancient seas. |
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Definition
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Term
| Decayed bodies of organic matter slowly turned into petroleum and natural gas under the --- and --- deep within the earth. |
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Definition
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Term
| What type of fossil fuel is mainly used in vehicles for transportation? |
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Definition
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Term
| Why is petroleum mainly used for transportation? |
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Definition
| It is easier to store and transport than coal and natural gas. |
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Term
| What fossil fuel is mainly used for cooking and heating? |
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Definition
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Term
| What is natural gas mostly made of? |
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Definition
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Term
| Where is natural gas found? |
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Definition
| Natural gas is often found in the ground near deposit of petroleum. |
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Term
| --- is a fossil fuel that was formed when plants that lived in swamps millions of years ago fell to the bottom of the swamp and were quickly buried. Great pressure was applied and most of the water was pushed out. The material is now mostly carbon. |
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Definition
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Term
| Most coal in the US is used to make ---. |
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Definition
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Term
| The greater the carbon content the more --- the coal produces. |
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Definition
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Term
| --- is an early form of coal made up of dead swamp plants. It has the least amount of carbon. |
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Definition
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Term
| --- coal prduces very little heat. It is a brown looking coal that has more carbon than peat but less than bituminious and anthracite. |
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Definition
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Term
| --- coal is mostly used in factories. It is the 3rd state of coal formation. |
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Definition
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Term
| --- coal is a valuable type of coal that produces a lot of heat and very little smoke. It contains the most carbon and burns the hottest. It is the fourth stage of coal formation. |
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Definition
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Term
| --- are chemicals made from petroleum. |
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Definition
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Term
| What are some products made from petrochemicals? |
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Definition
| medicines, make-up, paints and plastics |
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Term
| Why do scientists study fossils? |
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Definition
| Scientists study fossils to find out more about what the plants and animals were like that are now extinct, and to learn what the earth was like in the past. |
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Term
| What can scientists learn from fossils? |
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Definition
| Two things that scientists can learn what an animal ate (fossil droppings), and how they walked (footprint trace fossils). |
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Term
| Where are most fossils found? |
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Definition
| Most fossils are found in sedimentary rock. |
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Term
| Why are most fossils found in sedimentary rock? |
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Definition
| animal and plant remains became covered by the layers of sediment. |
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Term
| How can scientist know which fossils are older or younger? |
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Definition
| Fossils found in the bottom layer of sediment are probably older. The youngest fossils would probably be found in the top layer. |
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Term
| What details would a scientist check for on a fossil of animal tracks? |
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Definition
| They would check the shape, size, depth of the track. They would measure the distance between tracks, and the track's pattern. If two tracks are in the same layer, they probably happened during the same time period. |
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Term
| Explain how the energy we use today came originally from the sun. |
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Definition
| Fossil fuels are formed from plants and microorganisms that had energy stored in them. This stored energy now serves as fuel. The sun was the source of this energy. |
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