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Infection and response
Organisation
Cell biology
Biological molecules
Homeostasis and response
Responding to change (a2 only)
Energy transfers (a2 only)
The control of gene expression (a-level only)
Substance exchange
Bioenergetics
Genetic information & variation
Inheritance, variation and evolution
Genetics & ecosystems (a2 only)
Ecology
Cells
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1f industrialisation and the people: britain, c1783-1885
1c the tudors: england, 1485-1603
Britain & the wider world: 1745 -1901
Inter-war germany
World war one
2n revolution and dictatorship: russia, 1917-1953
World war two & the holocaust
1l the quest for political stability: germany, 1871-1991
The cold war
2j america: a nation divided, c1845-1877
Medieval period: 1066 -1509
The fight for female suffrage
2m wars and welfare: britain in transition, 1906-1957
2d religious conflict and the church in england, c1529-c1570
Britain: 1509 -1745
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09/02/2023
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( 09/02/23 Wave Basics →waves transfer energy from one place to another without tra sferring matter.. →waves tranfer information and energy in the direction they're travelling. →when waves travel through a medium, the particles of th medium vibrate and transfer energy and information betwe en each other. → the particles stay in the same place crest kwavelength rest position Distance Tamplitude utive length trough Amplitude of a wave is the displacement from the rest positi- on to a crest or trough. Wavelength is the length of a full cycle of the wave. •Period of a wave. is the number of seconds for a full cycle. • Frequency is the number of complete cycles of the wave (Hz) measured in herk passing a certain point per second. This i 1Hz is I wave per second. Transverse waves меееееееее Sideways vibrations. → the vibrations are perpendicular (at 90°) to the direction the wave travels. Hall electromagnetic waves are transverse and water. Up and down vibrations locelle e еееееее Longlitudinal waves. ↳ vibrations are parallel to the direction travelling. they squash up and strech out making compressions and refractions. WAVE SPEED = FREQUENCY X WAVELENGTH
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