Edexcel IGCSE Chemistry: Double Science 复习笔记：1.1.1 The Three States of Matter The Three States of Matter The three states of matter are solids, liquids and gases A substance can ...
Temperature & Enzyme Activity Changing air temperature can have a significant impact on the metabolism of living organisms due to the effect of temperature on enzyme activity Enzymes have a spe...
The Effects of Climate Change Greenhouse gases absorb infrared radiation emitted by the earth, causing the atmosphere to warm The higher the concentration of greenhouse gases in the atmosphere, the...
Models of Future Climate Change It is possible to use existing data relating to global warming to make predictions about global temperatures in the future Using data in this way is known as extrapo...
The Greenhouse Effect When radiation from the sun hits the earth, it is radiated back from the earth's surface A greenhouse gas is a gas that absorbs this re-radiated radiation, trapping it in the ...
Evidence for the Causes of Climate Change Scientists have long hypothesised that Climate change in the form of global warming is currently taking place Human activities that increase the concentrat...
Introduction to Climate Change The term climate refers to the weather conditions in a region over a long period of time i.e. several decades When the weather conditions in a region change significa...
Practical: The Hill Reaction The light-dependent reactions of photosynthesis take place in the thylakoid membrane and involve the release of high-energy electrons from chlorophyll molecules in phot...
Products of Photosynthesis Intermediate molecules of the Calvin cycle such as glycerate 3-phosphate (GP) and glyceraldehyde 3-phosphate (GALP) are used to produce other biological molecules needed ...
