Elastic Strain Energy Work has to be done to stretch a material Before a material reaches its elastic limit (whilst it obeys Hooke's Law), all the work is done is stored as elastic strain energy Th...
Edexcel IGCSE Biology 复习笔记 2.10.6 The Human Nervous System The Human Nervous System: Structure The human nervous system consists of: Central nervous system (CNS) – the brain and spinal c...
Tensile Stress & Strain Opposite forces can deform an object If the forces stretch the object, then they are tensile forces Tensile forces lead to the two properties of materials known a...
Edexcel IGCSE Biology 复习笔记 2.10.5 Co-ordination Systems in Humans The Human Nervous System & Endocrine System There are two different control systems in humans that work together to ...
Edexcel IGCSE Biology 复习笔记 2.10.4 The Role of Auxin in Phototropism The Role of Auxin in Phototropism Plants produce plant growth regulators (similar to hormones in animals) called auxin...
Hooke's Law When a force F is added to the bottom of a vertical metal wire of length L, the wire stretches A material obeys Hooke’s Law if: The extension of the material is directly proporti...
Edexcel IGCSE Biology 复习笔记 2.10.3 Response to Stimuli: Plants Response to Stimuli: Plants Plants need to be able to grow in response to certain stimuli For example, plants need to be abl...
What are logarithms? A logarithm is the inverse of an exponent This is in the formula booklet Your GDC will be able to use this function to solve equations involving exponents Try to get used to ‘r...
Edexcel IGCSE Biology 复习笔记 2.10.2 Control of Homeostasis Co-ordinating a Response Homeostasis (maintaining controlled conditions within the body) is under involuntary (automatic) control...
