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10 Cards in this Set
- Front
- Back
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groups of classification: kingdom phylum class order family genus species |
binomial system two parts of name: first genus then species genus in capital letters and species in lowercase. |
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problems with classifying evolution bacteria does not interbreed members of two species interbreed. such as a mule, a horse cross zebra |
classification and evolution organisms are usually closely related except if they live in separate habitats it is important to know the difference between organisms. |
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pyramids of biomass pyramids of biomass show the dry mass of living material at each stage of the food chain. they are difficult to construct because some organisms feed on different trophic levels. |
energy flow however, at each trophic level much of the energy is transferred into another, less useful forms, such as: heat from respiration egestion excretion energy used for growth divided by energy input= efficiency |
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the carbon cycle carbon dioxide can be locked up in limestone for a long time. the oceans are often called a carbon sink. the carbon in limestone can return to the air as carbon dioxide during volcanic eruptions. carbon needs to be recycled so it can become available to other organisms |
the nitrogen cycle plants take in nitrogen compounds along a food chain. a number of microorganisms are responsible for the recycling of nitrogen: decomposers nitrifing bacteria deitryifing bacteria nitrogen fixing bacteria |
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competition similar animals living in the same habitats will compete for food even if they are the same species. an ecological niche describes the habitat that an organism lives in and also its role in the habitat. competition can be inter-specific and intra-specific |
predator-prey relationships both predator and prey show cyclical changes. if there are more predators hunting prey then he number of prey if going to decrease therefore the number of predators will decease because of not having enough food. |
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P2 Revision! |
lithosphere the outer layer of the earth is called the lithosphere. The lithosphere is made up from tectonic plates which are moved by convection currents. |
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plate tectonic theory in 1914 Wegener cam up with a theory on how the tectonic plates move however, there was not enough evidence to prove it but in the 1960s new sea floor spreading lead scientists to believe that Wegener's theory was true. |
Raw Materials some raw materials used to construct are found in the earths crust. hardness is compared by rubbing 2 materials together. |
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rock hardness limestone is sedimentary rock-soft sediments are compressed and cemented together marble is metamorphic rock- forms when limestone is changed by heat and pressure granite is igneous rock- formed when magma cools |
cement and concrete thermal decomposition is a reaction where one substances breaks down on heating to give at least 2 new substances calcium carbonate thermally decomposes when heated. |
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Reinforced concrete reinforced concrete has a steel rod or mesh in between it to stop cracks appear and make it with stand harder pressure. |
extracting copper REMEMBER... OILRIG oxidation is loss, reduction is gain advantage- low boiling points disadvantage-the actual separating process may produce pollution. |
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alloys alloys are mixtures containing as least one metal smart alloys return to their original shape after being heated to a certain temperature. smart alloys are becoming more important as new ways to use them are found |
The Haber process nitrogen+hydrogen-->ammonia best conditions: use a catalyst made of iron raise temp to 450 degrees use high pressure 200 atmospheres the optimum temp is around 450 degrees. although the yield is not very high, the rate is fairly quick. this is the best compromise or 'best of bad balance' |
