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Physics Year 9 Triple LPP
Topic 3 - Light and the EM Spectrum
Topic 2 - Waves
Topic 1 - Energy
Content
Explain conservation of energy.
Explain energy changes in specific examples.
Produce energy diagrams to show energy transfers.
Explain what dissipation of energy means.
Explain how mechanical processes are wasteful.
Explain why electrical energy is transmitted at high voltages.
Explain the role of the step up and step down transformer.
Explain ways of reducing unwanted energy transfers including lubrication, thermal
energy and low resistance wire.
Describe the effects of thickness and thermal conductivity of walls
Calculate efficiency in energy transfers.
Explain how efficiency can be increased.
Describe renewable sources of energy.
Describe non-renewable sources of energy.
Explain patterns and trends in the use of energy resources.
Recall what a wave is
Define, frequency, wavelength, amplitude, period and velocity
Explain the difference between longitudinal and transverse waves with examples.
Calculate wave velocity.
Describe how to measure the velocity of sound in air and ripples on water.
Calculate depth using wave velocity equation.
Describe reflection, refraction, transmission and absorption.
Explain refraction.
Explain how the wavelength determines what will happen to the wave at a boundary.
Describe what an ultrasound wave is.
Describe what an infrasound wave is.
Describe uses of ultrasound and infrasound including sonar, foetal scanning and
exploring the Earth’s core.
Calculate changes in velocity, frequency and wavelength when sound goes from one
boundary to another.
Investigate suitability of equipment to measure speed, frequency and wavelength of
a wave in a solid and fluid.
Explain reflection with the aid of diagrams.
Explain refraction with the aid of diagrams.
Explain total internal reflection with the aid of diagrams and referring to the critical
angle.
Explain the difference between specular and diffuse reflection.
Explain how colour of light is related to absorption at surfaces and filters.
Describe refraction of light in converging and diverging lenses.
Explain the difference between real and virtual images.
Relate the power of a lens to its shape.
Recall what type of wave electromagnetic waves are and how they travel in a
vacuum.
Name the electromagnetic waves in order, including the colours of the visible
spectrum.
Recall that eyes can only detect limited frequencies.
Recall that different substances may absorb, transmit, refract or reflect waves in
ways that vary with wavelength.
Explain that all bodies emit radiation but the intensity and wavelength of the
emission depends on temperature.
Explain what has to happen if a body is to remain at constant temperature.
Explain what happens if there are differences between what a body radiates and
absorbs.
Investigate how the nature of a surface affects the amount of thermal energy
radiated or absorbed.
Explain how the dangers of EM waves changes with frequency.
Describe the dangers of microwaves, infrared, ultraviolet and x-ray and gamma.
Explain the uses of each electromagnetic wave.
Topic 4 Motion
Topic 5 - Radioactivity
Topic 6 – Uses and Dangers
of Radioactivity
Recall that radio waves can be produced by oscillations in electrical circuits.
Explain how changes in the nuclei of atoms can generate radiation.
Explain the difference between a vector and scalar quantity
Give examples of vector and scalar quantities.
Define velocity.
Calculate speed with units and re-arrange the formula using a formula triangle.
Label a distance time graph to show the motion of an object.
Use a distance time graph to calculate the speed of an object using the gradient.
Calculate acceleration giving the units
Calculate change in velocity giving units.
Label a velocity time graph to show the motion of an object
Calculate the distance travelled by an object using the area underneath a velocity
time graph
Recall some typical speed and state the acceleration of free fall.
Explain Newton’s first law for objects that have a resultant force and those that
don’t.
Explain Newton’s second law and use and re-arrange the two formulas that go with
it.
Explain Newton’s third law in reference to momentum and calculate momentum,
also re-arranging the formula.
Explain centripetal force and inertial mass.
Describe stopping distance and explain the factors that effect it including speed using
KE= 1/2mv2.
Describe the structure of an atom including, electrons, protons and neutrons,
nucleus and shells.
Compare the charge and mass of protons, neutrons, electrons and positrons.
Explain what an isotope is with examples.
Explain what happens when an electron absorbs or emits electromagnetic radiation
Explain how an atom can become a positive ion.
Describe what is meant by radioactive decay.
Describe and explain the structure and properties of alpha, beta and gamma.
Describe and explain the process of alpha, beta + , beta – and gamma decay
Balance nuclear equations to show radioactive decay
Define half-life and recall the unit of radioactivity
Use half- life to carry out simple calculations
Describe what is meant by background radiation and describe its origins.
Describe methods for measuring and detecting radioactivity.
Describe the uses of alpha, beta and gamma.
Describe the dangers of ionising radiation and explain how they depends on half life
Describe the difference between irradiation and contamination and link it to hazards
Compare and contrast internal and external cancer treatment
Explain how radiation is sued in tracers and PET scanners
Evaluate the advantages and disadvantages of nuclear power
Explain fission step by step including the chain reaction.
Explain how fission is controlled using control rods and moderators.
Explain how the thermal energy from fission is used to generate electricity.
Describe nuclear fusion
Explain why nuclear fusion cannot happen at low temperature and pressures
Explain why we don’t use fusion in power stations.