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Frequency is the number of complete waves passing a certain point per second OR the number of waves produces by a source each second, Frequency is measured in hertz (Hz). 1 Hz is 1 wave per second

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understand how differences in the wave speeds and behaviour of P-waves and S-waves can be used to give evidence for the structure of the earth.

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What is a wave ? A wave is a disturbance,caused by a vibrating source that transfers energy in the direction that the wave travels without transferring matter.

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Transverse and Longitudinal Waves in Physics

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Understanding how rocks provide evidence for changes in the earth.

- Erosion : the process of eroding or being eroded by wind, water, or other natural agents

- Sedimentation : deposit: the phenomenon of sediment or gravel accumulating

-Fossils : the remains or impression of a prehistoric plant or animal embedded in rock and preserved in petrified form.

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Light Travel

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One of my favourite films I really like to watch. It silently answers the question: Are we alone in the Universe? More recent science reveals that the big picture of our Universe is very similar to neuron networks, so again holographic principle of everything is taking place.

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A great example of red shift and how its moving away from us !

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Our Universe and the Big Bang - Classroom Demonstration - Redshift

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http://edchat.net - © Crown Copyright. Provided by Education not Limited Further resources available on http://edchat.net Licensed to Education not Limited formerly The Artists' Guild Ltd. Licence information available at www.edchat.net

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understand that the source of the suns energy is the fusion of hydrogen nuclei

- the solar system was a cloud of dust and gas. Over millions of years , this cloud contracted under the force of gravity. At its centre, the cloud became hot enough for a process called fusion to start-hydrogen nuclei to join together to form helium. This process gives out lots of heat and energy. This is how our star (the star) was formed. Other parts of the cloud slowly clumped together to become the other objects in the solar system.

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'Understand how Wegener's theory

accounts for mountain building'

- Wegener put forward his theory of

continental drift in 1912 stating that

the continents were once joined together

and were drifting apart dismissing the

theory of connecting land bridges.

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Wegener's theory of continental drift

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Alfred Wegener's Theory of Continental Drift

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There are many things that the sedimentary rocks can show us about history of life on Earth by examining it.

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the theory was not accepted at first.

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The Big Bang theory describes how the Universe began in a rapid expansion about 13.7 billion years ago and has evolved since that time. It is thought that all of space was created in this first moment.

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Understand that the equation which links energy, transferred, power and time is

ENERGY= POWER X TIME

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Recall that light travels through space (a vacuum) at a very high but finite speed, 300,000 km/s

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fossils were found on different sides of the earth and that tells us that the continents drifted

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'Understand that the Solar System was formed over very long

periods from clouds of gases and dust in space, about 5 thousand

million years ago'

- The solar system was formed by clouds of gases and dust. This caused the cloud in space to be disturbed by the nearby star called a supernova

- This explosion made waves in space which squeezed the cloud of gas and dust. Squeezing made the cloud start to collapse, as gravity pulled the gas and dust together, forming a solar nebula.

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The mantle, core and crust

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he speed of an object tells you how fast or slow it's moving.

The faster something moves, the greater the distance it covers in a given time, or the less time it takes to cover a given distance.

For example, a car that is driven 100km in 2 hours is going faster than one covering 60km in 2 hours, and the fastest 100m sprinter finishes in the least time.

speed (metres per second, m/s) = distance (metre, m) / time (seconds, s)

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The wave length is the space between two corresponding crests. To work out the wave length you need to know this equation; Wave length= Wave speed*Frequencey

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understand that a beam of electromagnetic radiation transfer energy in 'packets' called photons

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gcse frequency wavelength trend uses radio waves, microwaves, infrared, red visible light violet, ultraviolet, X-rays, gamma rays, ionisation P2.1 What types of electromagnetic radiation are there? What happens when radiation hits an object? Unit P2 Radiation and life OCR GCSE 21st Century Science Physics

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PLEASE NOTE NEW revision summaries for the NEW OCR 21st Century Science B GCSE Physics B and NEW OCR GCSE 21st Century Combined Science B Physics courses: Revision for Chapters P1-3 andChapters P4-6 STARTING with Y10 in Sept. 2016 onwards, first exams in 2018

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The amplitude of a wave is the distance from the maximum displacement to the undisturbed position

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understand that the sea floor spreading is a consequence of movement of the mantle (convection due to heating by the core)

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The solar system consists of a star (The sun) and lots of stuff orbiting it

1) There are eight planets orbiting the sun in almost circular paths (ellipses).

2) Closest to the sun are the inner planets - Mercury, Venus, earth and Mars.

3) The asteroid belt then the outer planets, much further away - Jupiter, Saturn, Uranus and Neptune,e

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Light and other types of electromagnetic radiation are transverse waves. Water waves and S waves (a type of seismic wave) are also transverse waves. In transverse waves, the vibrations are at right angles to the direction of travel.

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recall that a light-year is the distance travelled by light in a

year

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recall that the sun is one of the thousands of millions of stars in the milkyway galaxy

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Understand that sea floor spreading is caused by two oceanic plates moving away from each other.

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Distinguish between perceived risks and measured risk (e.g. flying is statistically safer than crossing the road)

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did you know that the sea floor spreads a few centimetre's a year.

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did you know that the sea floor spreads a few centimetre's a year.

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- Kieran

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'Understand that for a constant wave speed the wavelength of the wave is inversely proportional to the frequency'

- The wavelength and the frequency of light are closely related. The higher the frequency , the shorter the wavelength.

- All light waves move through a vacuum at the same speed

- The equation that relates wavelength and frequency for electromagnetic waves is:  λν=c

λ → wavelength

ν → frequency

c → speed of light