IB DP Biology: SL复习笔记4.2.7 Climate Change: Causes
Industrialisation & Increased Carbon Dioxide Atmospheric carbon dioxide levels have fluctuated throughout Earth's history due to events such as volcanic eruptions and the weathering of limeston...
IB DP Biology: SL复习笔记4.2.6 Climate Change: Impact
Greenhouse Gases & Climate Patterns Greenhouse gases absorb infrared radiation emitted by the earth, causing the atmosphere to warm Without greenhouse gases, the earth would be much colder The ...
IB DP Biology: SL复习笔记4.2.5 Climate Change: Greenhouse Effect
The Main Greenhouse Gases When radiation from the sun hits the earth, it is radiated back from the earth's surface as long-wave radiation A greenhouse gas is a gas that absorbs this re-radiated rad...
IB DP Biology: SL复习笔记4.2.4 Carbon Cycle: Organic Matter
Formation of Peat Under normal conditions the tissues of dead organisms are completely broken down by decomposers known as saprotrophs and detritivores These decomposers require specific conditions...
IB DP Biology: SL复习笔记4.2.3 Carbon Cycle: Methane
Methanogenesis Methane (CH4) is a simple hydrocarbon It is present as a gas in the atmosphere, and underground, and is the main component of natural gas fossil fuel Methane can be produced by the n...
IB DP Biology: SL复习笔记4.2.2 Carbon Cycle: Carbon Dioxide in the Atmosphere
Respiration & Carbon Dioxide All living cells carry out some form of cellular respiration, from bacteria, to plants, to animals Many organisms carry out aerobic respiration Aerobic respiration ...
IB DP Biology: SL复习笔记4.2.1 Carbon Cycle: Carbon Dioxide
Carbon Fixation Carbon is present in the atmosphere in the form of carbon dioxide gas Carbon is taken out of the atmosphere by plants to be used in photosynthesis Plants are autotrophs Autotrophs u...
IB DP Biology: SL复习笔记4.1.9 Skills: Pyramids of Energy
Pyramids of Energy Pyramids of energy illustrate the amount of energy contained within the biomass of organisms at each trophic level The length of each box, or bar, represents the quantity of ener...
IB DP Biology: SL复习笔记4.1.8 Skills: Chi-squared test & Statistical Significance
Chi-squared Test for Association Looking for associations between species The distribution of species in a habitat is rarely random; it usually depends on factors such as soil type, water availabil...
