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19 Cards in this Set
- Front
- Back
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Energy types /stores of energy |
kinetic energy Internal energy ( thermal , heat ) Elastic potential energy Gravitational potential energy Electrical energy Magnetic energy Nuclear energy Chemical store |
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Calculating eficiency |
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Payback time |
The payback time tells you how long it will take to save the money that it cost to install something in cold countries. |
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Renewable energy |
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Wind energy ( renewable ) |
A : turbines are cheap . No pollution . D : turbines are ugly and noisy . If there is no wind , you get no energy . |
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Wave energy ( renewable ) |
A : no pollution . D : need a lot of machinery. Machines are expensive. Machines can be harmed by storms. |
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Geothermal energy ( renewable ) |
A: no pollution . Doesn't damage the environment. D :few places to do this . Very expensive to drill deep in the ground. |
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Hydroelectric energy ( renewable ) |
A : No pollution . Store the water up high and use it when we need the energy . D : cost a lot of money. Damm can ruin local environment. |
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Solar Energy ( renewable ) |
A : no pollution . D : solar cells/panels are expensive. Only works if it is sunny. |
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Bio fuels (renewable as long that we keep planting the ones we cut ) |
A : doesn't need any special equipment. D : does add to the green house affect. |
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Tidal energy ( renewable ) |
A : no pollution Reliable Cheap to run D : expensive to build a dam . Can cause local flooding. |
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Nuclear energy ( non-renewable ) |
A: no pollution No lost of energy by producing. Good use of radioactive rocks . D : dangerous to have close to a nuclear plant. Very expensive to set a nuclear reactor. |
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Fossil fuels |
Fossil fuels are useful because they provide much energy. |
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Microbes / pathogens |
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Primary defences |
1.enzymes in tears kill bacteria 2.stomach acid kills bacteria + viruses 3.wwhite blood cells help kill pathogens 4.the skin don't let the pathogens come in 5.cicilia in the trachea sweeps the mucus to the stomach 6.the mucus traps microorganisms 7.nose hair traps microorganisms organisms 8.scabs don't let bacteria enter or blood leave |
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Types of white blood |
Phagocyte : ingest pathogens Lymphocytes : releases antibodies and anti -toxins |
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The process of phagocytosis |
1. The bacteria releases chemical substances that attract the phagocyte. 2. The phagocyte attach to the pathogen. 3.The phagocyte ingest the pathogen 4. The phagocyte produce digestive enzymes that break down the pathogen The digested pathogen is released by the phagocyte. |
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Immune response |
The way white blood cells response to the pathogen by producing antibodies. |
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How does antibodies kill the pathogen |
1. The antibodies alert the phagocyte of the presence of the pathogen. 2. The antibodies may start a series of reactions which produces enzymes when they are connected with the pathogen . |
