2011 PRELIMINARY EXAMINATION PAPER Senior Science General Instructions * Reading Time – 5 minutes * Working Time – 2 hours * Write using black or blue pen * Draw diagrams using pencil * Board-approved calculators may be used * Write your Student Number at the bottom of this page | Total Marks - 75 Section I Pages 2–1675 marksThis section has two parts‚ Part A and Part BPart A – 20 marks * Attempt Questions 1–20 * Allow
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air the more our ozone layer is affected. C02 is a natural gas and is always being emitted and absorbed to and from the air. There is a certain amount of carbon on the earth. But it’s constantly in a series of exchanges. When a tree goes into photosynthesis‚ it absorbs CO2 from the air. When a tree dies‚ carbon is transferred from the forest to the soil and eventually into the air as CO2. When a factory uses energy to make products‚ it emits carbon into the atmosphere. There are many such exchanges
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"sink" that can locks up as much carbon dioxide produced by human being and animals.When we release the carbon dioxide and water vapour from our lungs‚the trees will absorb carbon dioxides as many as possible to carry on it’s photosynthesis everyday.The process of photosynthesis can convert carbon dioxide into organic compound using the sunlight‚water and carbon dioxide to release oxygen as waste product.According to analysis of saintists‚ the photosynthetic organisms of tree can convert around 100
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Death in the open In the essay “Death in the Open” Lewis Thomas talks about the dead animals he finds on the side of the road and how he feels about such death. Life is about leaving an impression in one way or another. Death is a reflection on what a person has done in the world. Thomas’ feelings towards death is sadness and anger because of the way he reacts towards dead animals on the side of the road‚ how he feels about life as a whole is a positive feeling‚ and how he thinks animals deal with
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Nutrients | - | Temperature | - | Humidity | - | Wind | - | Gravity | - | Day length | - | Space to expand | - | Appropriate environmental setting | - | THREE MAJOR three major functions that are basic to plant growth and development Photosynthesis – The process of
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All oxygen-breathing life forms take in Oxygen and exhale CO2. Plants take in the CO2 and use it in their photosynthesis process and in turn give off oxygen. The Carbon Dioxide-Oxygen Cycle is a continuously occurring process whereby animals inhale Oxygen and then exhale carbon dioxide‚ and plants use the CO2 and "exhale" O2. Plants and other producers use carbon dioxide in photosynthesis. They produce oxygen as a waste product. Carbon dioxide moves from the air into the leaves of plants. Oxygen
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An ecosystem is a biological environment consisting of all the organisms living in a particular area‚ as well as all the nonliving or abiotic‚ physical components of the environment with which the organisms interact‚ such as air‚ soil‚ water and sunlight. In a typical ecosystem‚ plants and other photosynthetic organisms are the producers that provide the food. (Leibold) Ecosystems can be permanent or temporary and they usually form a number of food webs. Examples of ecosystem include: Marine Ecosystems:
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Use this document to report your findings from the LeafLab Exploration Experiment. The lab report consists of three sections: Data‚ Exploration‚ and Lab Summary. Data: copy any data‚ graphs‚ charts‚ or notes that you have saved in your LeafLab online notebook into this section. Exploration: Answer the questions. The questions in the Exploration section are the same questions in your LeafLab instructions. Lab Summary: Write a 100- to 200-word summary. Data To copy your data from your online
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Biology 1101 – Homework 3 Cells: Structures & Processes Organelles & Illness - Imagine that you are part of a research team that specializes in diagnosing disorders associated with malfunctioning cellular organelles and structures. Medical doctors consult you to provide a cellular explanation for particularly difficult cases. You recently received the two patient histories outlined below – what is your diagnosis? Note – this exercise is only asking you to determine which cell structure might be
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nutrients. The nitrogen in the compost which will be absorbed helps plants grow quickly whilst also allowing the leaves to stay green. Nitrogen also aids in photosynthesis as it helps with the green pigment‚ chlorophyll. Phosphorus encourages the growth of roots‚ and helps with the growth of the plant. Potassium also assists in photosynthesis‚ the fruit quality‚ the building of protein‚ and the reduction of disease. Therefore since all those nutrients are present in the compost‚ the tomatoes which
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