Chemistry Research Assessment

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Research Portfolio.
Sarah Pearn, 23336383

Table of Contents
Water:3
1.2.3 Compare the state, percentage and distribution of water in the biosphere, lithosphere, hydrosphere and atmosphere.3
1.2.4 Outline the significance of the different states of water on the Earth in terms of water as:4
1.A constituent of cells and its role as both a solvent and a raw material in metabolism4
2.A habitat in which temperature extremes are less than nearby terrestrial habitats4
3.An agent of weathering of rocks both as liquid and solid5
4.A natural resource for humans and other organisms5
5.2.7 Explain why water’s ability to absorb heat is important to aquatic organisms and to life on earth generally.6
5.2.8 Explain what it is meant by thermal pollution and discuss the implications for life if a body of water is affected by thermal pollution.7
Energy8
1.2.1 Outline the role of photosynthesis in transforming light energy to chemical energy and recall the raw materials for this process8
1.2.2 Outline the role of the production of high energy carbohydrates from carbon dioxide as the important step in the stabilisation of the sun’s energy in a form that can be used by animals as well as plants9

1.2.3 Identify the photosynthetic origins of the chemical energy in coal, petroleum and natural gas10
1.3.1 Process and present information from secondary sources on a range of compounds found in either coal, petroleum or natural gas on the location of deposits of the selected fossil fuel in Australia11

3.3.3 Process and present information from secondary sources and use available evidence to identify safety issues associated with the storage of alkanes.14
4.2.8 Identify the sources of pollution which accompany the combustion of organic compounds and explain how these can be avoided.15

Water:
1.2.3 Compare the state, percentage and distribution of water in the biosphere, lithosphere, hydrosphere and atmosphere.

Sphere of the Earth| State in which water is found| Percentage of Earth’s water| How it is distributed| Biosphere| Liquid| 0.0001| * Living things:[60-90% present in sphere] * Jellyfish= 95% * Humans=50-75%| Lithosphere| Liquid| 0.6| * Rocks throughout the Earth:[<10% present in sphere] * Ground water * Chemically bounded to minerals | Hydrosphere| Solid, liquid| 99.4| * Oceans/ Lakes/Rivers * Icecaps * Glaciers[>95% present in Oceans, >99% in other sectors]| Atmosphere| Solid, liquid, gas:| 0.001| * Water vapour * Rain * Snow[0.5-5% present in sphere]|

http://library.thinkquest.org/09jan-oracle-n-001/02242/page_490783175.html Dot Point, preliminary chemistry

1.2.4 Outline the significance of the different states of water on the Earth in terms of water as: 1. A constituent of cells and its role as both a solvent and a raw material in metabolism

2. A habitat in which temperature extremes are less than nearby terrestrial habitats

Fish Algae Bacteria Advantages of living in water bodies:
* Less fluctuation in temperature: oceans have a mild temperature than on land. * Specific heat capacity of water is high: water needs an increase of heat energy relative to other substances to rise to a certain temperature. * Marine organisms do not need to continually evolve and adapt as water temperatures do not fluctuate as much as the terrestrial environment.

3. An agent of weathering of rocks both as liquid and solid

4. A natural resource for humans and other organisms
NATURAL RESOURCE= something that occurs naturally in an environment which is utilised and used by humans. Home| Industry | Farming| Recreational activities|
Washing| Power stations| Irrigation (e.g.: crops)| Swimming and surfing| laundry| A coolant| Washing livestock and its environment|...
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