What are fossils? Fossils are the remains or marks of plants and animals that lived a very long time ago. They are usually found in rocks and stones. Fossils are important because they tell us a story about things that lived on the earth before us. What Things Become Fossils? Animals and plants become fossils. So do nests‚ eggs‚ footprints and even animal droppings! How are Fossils Made? Fossils are made from the hard parts of plants and animals‚ such as:-bark‚ seed cases‚ bones and
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energy” refers to any form of energy that is not derived from fossil fuels. Alternative energy sources like wind farms‚ solar cells‚ hydroelectric dams‚ biomass fuels‚ and nuclear power have been considered to be attainable sources that will be able to sustain the global population’s high demands. Traditional energy sources like oil‚ gas and coal are what the modern world knows and is most comfortable with‚ as its established fountain of fuel. Weighing the benefits and drawbacks of one power source
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Introduction to Physical Science: Energy and Fuels Energy is defined as the capacity or power to do work‚ such as the capacity to move an object (of a given mass) by the application of force. Energy can exist in a variety of forms‚ such as electrical‚ mechanical‚ chemical‚ thermal‚ or nuclear‚ and can be transformed from one form to another. It is measured by the amount of work done‚ usually in joules or watts. All known forms of energy can be converted from one form to another. The Law of Conservation
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A fuel cell is a device that transfers the chemical energy from a fuel into electricity through a chemical reaction of positively charged hydrogen ions with oxygen or another oxidizing agent [1]. Fuel cells can produce electricity continuously until these inputs are supplied. The first fuel cells were invented in 1838. Since then‚ fuel cells have been used in many other applications. Fuel cells are used for primary and backup power for industrial‚ commercial and residential buildings and in inaccessible
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Fossil Fuels which include Petroleum and Natural Gas were formed million years ago from the remains of plants and animals‚ are responsible 40% and 20% respectively for the world ’s energy. They were first discovered about 700-900 years ago‚ however since the first modern petroleum industry began in 1859‚ the demand for fossil fuels has escalated beyond our control. It had taken 50-300 million years to form‚ and yet we have managed to burn roughly half of all global oil reserves in merely 125 years
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listening have a conflict of opinions about ethanol fuel. The writer believes that ethanol fuel is not a suitable alternative for gasoline‚ while the lecturer claims that passage state is not convincing and disputes those ideas presented in the passage with several proofs. First of all‚ the author asserts that the ethanol fuel would not assist to fix global warming problem. Conversely‚ the lecturer brings up the idea that augmented of ethanol fuel does not adversely affect the environment. In other
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harmful gases that vehicles are giving off. Forget ethanol or biodiesel. The next big thing in automotive fuel may very well be hydrogen. Automakers rapidly are closing in on making hydrogen fuel cell vehicles an everyday fact of life‚ with several test models set to debut over the next few years. Hydrogen fuel cells to power vehicles are desirable‚ experts say‚ because hydrogen is a renewable fuel that can be used to create electricity to run cars. A chemical reaction between oxygen and hydrogen produces
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USE ALTERNATIVE FUELS‚ SAVE PLANET EARTH We are all aware of the current state of our environment. Mother Earth is on the brink of total destruction brought about by pollution‚ irresponsible use of resources‚ and the excessive use of conventional fuel such as fossil fuel and nuclear energy. Part of the efforts to save our planet is to shift from using conventional fuels to alternative ones such as wind energy‚ solar‚ tidal‚ wave‚ oceal‚ thermal‚ dendrothermal‚ biogas and biodiesel‚ alcohol
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Biodiesel Fuel The biggest problem the United States faces today when we talk about becoming energy independent is replacing the gas we use to power our vehicles. When we talk about replacing gasoline as the fuel we use to power our vehicles‚ biomass‚ hydrogen‚ and fuel cells are the three most talked about alternatives. Biomass‚ which is organic material made from plants and animals‚ contains stored energy from the sun. Biomass in the form of bio fuels can be used to make the same products
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Petroleum‚ otherwise known as petrol‚ results in pollution during every stage of production‚ this ranges from: mining and recovery to refining‚ transporting and more importantly using it as fuel. Drilling wells is responsible for direct pollution due to oil spills; consequently‚ drilling also leads to the injection of watery liquids into the wells which are later distributed as drilling mud that often cause their own toxic pollution. Furthermore‚ the transporting of such oil by tanker ships have
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