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Science revision
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Science revision
Waves
- Transverse waves
- Amplitude
- Displacement
- Wavelength
- Crest
- Trough
- Electromagnetic radiation
- string
- Longitudinal waves
- Rarefaction
- compressions
- Sound
- slinky
- Water
- Electromagnetic waves
- Gamma
- Xray
- Ultra violet
- Visible light
- Infra red
- Microwave
- Radiowaves
- Communication
- Cooking/heating food
- Radiowaves
- Tv remotes
- Thermal vision
- Microwave
- seeing
- Infra red
- Detecting forgery
- Killing bacteria
- Tan
- Invisible pens
- Tan
- Killing bacteria
- Visible light
- Seeing broken bones
- Ultra violet
- Sterilising
- Getting rid of cancer
- Xray
- Gamma
- Electromagnetic waves
- Travels through space that consists of no particles
- Mechanical waves
- Travel through particles and cause oscillations
- Wave speed
- Velocity/ frequency x wavelenght
- Sound
- Travels at about 340ms in air
- When it hits a hard surface it bounces off at the same angle
- Higher pitch = higher frequency
- Higher amplitude = louder volume
- Cannot travel in vaccum
- Human can hear from 20Hz to 20kHz
- 85dB Damages hearing
- !04 causes instant serious damage
- The doppler effect
- Sound waves change in pitch because waves are bunched at the front and spread out at the bck
- Coming towards us it sounds higher pitch
- Moving away means lower pitch
- Red shift blue shift
- Waves at front of light are bunched together when moving towards you causing it to have a bluish tint
- Light moving away from you, the waves are spread apart giving it a red shift
- Transverse waves
The big bang theory
- The universe was condensed into an infinatley small point, then by random chance the point started to expand causing the creation of our universe
- Cosmic background radiation from the big bang was found proving our universe is expanding
Fossil fuels
- Coal
- Oil
- Gas
- Nuclear power
- ! tonne of coal or 149 gallons of oil
- Fueled by uranium
- Creates steam
- Produces 880 megawatts
Renewable energy
- Geothermal
- Solar park
- Hydroelectricity
- Wind farm
National grid
- Generator
- Step up transformer
- Pylons and cables
- Step down transformer
- House
- High current low voltage
- Safety
- High current low voltage
- Soft iron core with insulated copper
- Primary coil tight secondary loose
- House
- Low current, high voltage
- Step down transformer
- Soft iron core with insulated copper
- Primary coil loose secondary tight
- Pylons and cables
- HIgh current low voltage
- Step up transformer
- Generator
Structure of the earth
- Outside = crust
- Mantle
- Outercore
- Innercore
- liquid
- Solid
- Innercore
- Outercore
- Mantle
- Outside = crust
Pangaea theory
- Alfred wegener
- Born in 1880
- Thought that continents fit like puzzle
- Same fossils found on peices of land that fit
- Same soil
- theory only been accepted since the 1950s
- Same soil
- Same fossils found on peices of land that fit
- Thought that continents fit like puzzle
- Born in 1880
- Alfred wegener
Changing the earth
- Weathering
- Eroding
- Deposition
- Burial and compaction
- SEdimentary
- Deformation
- Metamorphic
- melted
- Crystalised
- melted
- Metamorphic
- Deformation
- SEdimentary
- Burial and compaction
- Deposition
- Eroding
- Uplift
- Weathering
Mountains
- Andes
- oceanic plate denser than continental, pushed under continental
- Mid alantic
- Two oceanic plates being pushed apart by convection currents and releasing magma
- Himilayas
- Two continental, one under other
- Andes
Earths changing atmostphere
- Mainly carbon dioxide at first because there were amny volcanoes
- Water vapour released by volcanoes condensed and it rained for many years forming oceans, Ice meteors helped
- Plants formed and used carbon dioxide and produced oxygen
- Caused mass extinction
- Earth in future
- Golbal warming
- Rising sea levels
- Flooding of coastal ciies
- Rising sea levels
- Golbal warming
- Earth in future
- Caused mass extinction
- Plants formed and used carbon dioxide and produced oxygen
- Water vapour released by volcanoes condensed and it rained for many years forming oceans, Ice meteors helped
- Mainly carbon dioxide at first because there were amny volcanoes
Life on earth
- reationisim
- big bang
- artificiiial creation
- comets
- formed on earth
- In 1952 stanley miller and harold urey did an experiment
- They simulated life on earth by collecting gases that may have been in the atmostphere
- Adding an electric current which formed a dark slime called primordial soup
- This contained aminoacids which are the building blocks of life
- Adding an electric current which formed a dark slime called primordial soup
- They simulated life on earth by collecting gases that may have been in the atmostphere
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- Description
- Mind Map on Science revision, created by Tay Alex on 29/06/2015.
- Created by
- Tay Alex · Jun 2015
- Updated
- Feb 19, 2016
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