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in this topic we have lernt:

about food chains/webs

Photosynthesis

Respirationpesticides

how farms kill pesticides and what the effect is and what they use

the DTT (Toxicin)

bioaccumulation and it can kill a whole food chain/we

how plant cells are different to animal cells

how to extract and look at dna

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this game dispay how plant gained and losed gluecose during a day cycle. we started with 3 counters (gluecose) and dice and we rolled the dice etc

how ever one thing the game does not display is what would happen if a plant had more time in sunlight in summer a plant would have more gluecose than in the winter bceause it is exposed in more sunlight

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this is a diagram what show that you will gain more energy from eating a plant than eating meat from a cow

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this is the energy form class work

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A chemical reaction is the process in which a substance (or substances) changes to form one or more new substances, i.e. it is a process of change of some reactive initial to final products.

Chemical reactions are represented by chemical equations. For example the carbon (C) could react with oxygen gas (O2) to form carbon dioxide (CO2). The chemical equation for this reaction is written:

The ' +' is read as "react with" and the arrow means "produces". To the left of the arrow chemical formulas represent reagents known as starting substances. To the right of the arrow are the formulas chemical of the substances produced as reaction products. The numbers beside the formulas are the coefficients (the coefficient 1 is omitted).

In the previous reaction C and O2 are the reagents, the CO2 product.

The reaction of formation of water is written:

2 H 2 + O2 = 2H2O

note in the previous reaction (formation of the water) that the number of atoms of each element on each side of the equation is the same:

according to the law of conservation of mass atoms are neither created nor destroyed, during a chemical reaction. Therefore a chemical equation must have the same number of atoms of each element on both sides of the arrow. It is said that the equation is balanced.

How do you balance chemical equations?

1) its a standardized procedure described below:

2) determine reagents and chemical reaction products

3) will write the chemical equation reagent to products

4) balancing the equation of the following form:

-begins to match the equation trying different coefficients to ensure that the number of atoms of each element is equal in both sides of the equation. The subscripts in formulas cannot be changed.

-First look for elements that appear only once on each side of the equation and with the same number of atoms: the formulas containing these elements must have the same coefficient. Therefore, it is not necessary to adjust the coefficients of these elements at that time.

-Then look for items that appear only once on each side of the equation, but with different number of atoms and these elements are balanced. The elements that appear in two or more formulas on the same side of the equation are finally balanced.

-Verifies that the igualada equation has the same total number of atoms of each type on both sides of the equation arrow.

Example:
consider the combustion of the gas methane (CH4). This reaction consumes oxygen (O2) and produces carbon dioxide (CO2) and water (H2O). We can then write the chemical equation:

CH4 + O2 = CO2 + H2O

now count the number of atoms of each element in reagents and products:

reagents:
C = 1, H = 4, or = 2

products:
C = 1, H = 2, or = 3

carbon and hydrogen are in a compound of reagents and other products.

There are the same number of carbon atoms in the reagents that products, but twice more hydrogen in reagents that products and 1.5 times more oxygen in the products that the reagents.

This can be arranged by balancing the reaction, in order to match the number of atoms of each chemical species on each side of the equation. The carbon already is matched, or not have to do anything. For the H must be multiplied by two (2) in the water, thus there are now 4 H atoms on each side. But now we have that right (products) there are 4 atoms of oxygen (two of CO2 and two of the 2H2O), while that the only two left, which must be multiplied by two oxygen left (reagents)

CH4 + 2O2 = CO2 + 2H2O

The ideal is that in a chemical reaction reagents were in the correct proportion stoichiometric, i.e. in the proportion that describes the balanced chemical equation. However, usually tends to be to use an excess of one or more reagents, to get as much as possible of the less abundant reagent to react.

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What is stoichiometry? | Skoool - The London Grid For Learning

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A chemical reaction is the process in which a substance (or substances) changes to form one or more new substances, i.e. it is a process of change of some reactive initial to final products. Chemical reactions are represented by chemical equations. For example the carbon (C) could react with oxygen gas (O2) to form carbon dioxide (CO2).

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bitesize all about Respiration

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Respiration is the process by which cells obtain energy in the form of adenosine tri-phosphate or ATP.

ATP transfers chemical energy from the energy rich substances in the cell to the cell's energy requiring reactions.

When ATP breaks down, the energy created is used by the cell for processes such as active transport, DNA replication and muscle contraction.

The main respiratory substrate used by cells is 6-carbon glucose.

Respiration is a series of reactions in which 6-carbon glucose is oxidised to form [ [ carbon dioxide carbon dioxide: A gaseous compound of carbon and oxygen, which is a by-product of respiration, and which is needed by plants for photosynthesis.] . The energy released due to the oxidation of glucose: a simple sugar made by the body from food, which is used by cells to make energy in respiration] is used to synthesize ATP from adenosine diphosphate or ADP and inorganic phosphate or Pi. glucose

Fats and proteins can also be used as respiratory substrates.

Respiration is a stepwise series of reactions involving oxidation and reduction. The mnemonic OIL RIG may help you remember.

In oxidation, energy is released:

In reduction, energy is used up:

Breaking bonds releases energy, making bonds requires energy. This is true whether it is in a substrate of respiration or the energy transfer molecule ATP.

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BBC - Higher Bitesize Biology - Respiration : Revision

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Respiration is the process by which cells obtain energy in the form of adenosine tri-phosphate or ATP. ATP transfers chemical energy from the energy rich substances in the cell to the cell's energy requiring reactions. When ATP breaks down, the energy created is used by the cell for processes such as active transport, DNA replication and muscle contraction.

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bitesize al labout Photosynthesis

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BBC - Higher Bitesize Biology - Photosynthesis : Revision

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A BBC Bitesize secondary school revision resource for Higher Biology on photosynthesis: chloroplasts, light dependent stage, calvin cycle, limiting factors

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all about Photosynthesis

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BBC - Higher Bitesize Biology - Photosynthesis : Revision

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A BBC Bitesize secondary school revision resource for Higher Biology on photosynthesis: chloroplasts, light dependent stage, calvin cycle, limiting factors