You can choose values to illustrate this. wasted useful thermal 39 A machine is more ef cient if it transfers more energy than energy. c A planet with a weaker gravitational eld would make your weight smaller. Ossicles the small bones of the Pinna the outside part of the ear Primary colours of light are red, middle ear (hammer, anvil, and that we can see blue, and green stirrup) that transfer vibrations from the eardrum to the oval window Pitch a property of sound Primary data data collected determined by its frequency directly by scientists during a Outer ear the pinna and auditory particular investigation canal Pivot a support on which a lever turns or oscillates Primary source sources of data Outer planets Jupiter, Saturn, that you have collected yourself Uranus, and Neptune Pixel the small square that digital images are made of; a picture Primary sources (of energy) Oval window the membrane that element energy sources from the environment connects the ossicles to the cochlea or underground, such as coal, in the ear Plane mirror a mirror with a at uranium, or the wind re ective surface Oxide a compound made when an Principle of moments law that element combines with oxygen Planet any large body that orbits a says that the clockwise moments star in a solar system equal the anticlockwise moments Parallel circuit an electric circuit in which there are two or more Plastic a type of material that can Prism a triangular-shaped piece of paths for an electric current be stretched and does not return to glass used to produce a spectrum its original length of light Partial eclipse occurs when part of the light from the Sun is blocked Pluto used to be regarded as the Probability (risk) the chance that by the Moon or the Earth ninth and last planet from the Sun; something will happen now called a dwarf planet together Particles tiny pieces of matter with others of the same size that Property a characteristic, for are beyond Plutos orbit example wavelength and amplitude Pascal the unit of pressure, are properties of a wave symbol Pa, equal to 1 N/m2 Poles, of Earth the north and south points of the Earth Proportional a relationship in Payback time the time taken to connected by its axis of tilt which two variables increase at the recoup the cost of something, such same rate, for example when one is as home insulation or a wind turbine Poles, of magnet the opposite doubled the other doubles too and most strongly attractive parts Pendulum any rigid body that of a magnet Proxima Centauri the nearest swings about a xed point star to our Sun Positive (charge) describes the Penumbra the area of blurred or charge on a proton, or the charge Pupil the hole in the front of your fuzzy shadow around the edges of on an object that has had electrons eye where the light goes in the umbra transferred away from it Question in science, a problem Perforate to make a hole in Positively charged describes that is stated in a form that you something an object that has had electrons can investigate transferred away from it Period the time taken to complete Rainbow an optical phenomenon one cycle of motion Potential energy stored energy that appears as the colours of the spectrum when falling water Periscope a tube with mirrors or Power the rate of transfer of droplets are illuminated by prisms that enables you to see over energy, measured in watts sunlight objects Power station a place where fuel Rarefaction the part of a sound Permanent magnet a piece of is burned to produce electricity wave where the air particles are metal that stays magnetic most spread out Precision the number of Permanently extended the decimal places given for a Ray diagram a model of what irreversible extension of a spring measurement happens to light shown by drawing when loaded beyond its elastic limit selecting rays Prediction statement saying what Petrol (gas or gasoline) you think willhappen Reaction time in humans, the a hydrocarbon fuel (containing time the brain takes to process hydrogen and carbon) that Preliminary work the work information and act in response comes from crude oil that you do before or during the to it planning stage of an investigation, Phases of the Moon parts of the to work out how to do it Real describes an image that you Moon we see as it orbits theEarth can put on a screen, or the image Pressure the force applied by an formed in your eyes Photosynthesis the process by object or uid divided by the area which green plants make their of surface over which it acts Real depth the depth underwater own food from carbon dioxide and that an object actually is water using solar energy Pressure gauge an instrument formeasuring pressure in a liquid Receiver (sonar) a device that Pie chart a way of presenting or gas absorbs sound waves data in which only one variable is anumber 248. arm length (cm) 56 54 Use a neat pencil 52 cross for each point. 29 centripetal centripetal force force 1 Explain what meant by centripetal force. This resource fully covers the curriculum and prepares students for a smooth transition to IGCSE Physics. Reviews. He throws the ball upwards. A fast-moving car has moremovement energy than a slow-moving car. They are numbers, but there are no inbetween sizes. Complete Physics for Cambridge Secondary 1 covers all threeyears of Cambridge Secondary 1 Physics in the same book, flowing smoothly from one stage to the next. If you want to change the direction of motion, you need a force to act. This is one of the most important lawsinscience. In the graph below, all the points lie close to a straight line. Do gorillas have a chimpanzee diet different diet from fruit leaves and chimpanzees? But energy tells you that if you dont put fuel in the car then it cannot move. It is gravity that also keeps the planets and asteroids in orbit around the Sun, and keeps moons in orbit around other planets, like Jupiter. It is a road race and in some places the road | 1.11 is at, but in other places the racers cycle uphill and then downhill. In solar panels water runs through pipes and is heated using the energy from the Sun. Complete Physics for Cambridge Secondary 1 Student Book: For Cambridge Checkpoint and beyond Helen Reynolds 4.6 out of 5 stars 56 Paperback 29 offers from $18.07 Complete Physics for Cambridge Secondary 1 Workbook: For Cambridge Checkpoint and beyond Helen Reynolds 4.5 out of 5 stars 39 Paperback 23 offers from $11.23 Next page Product details Delivery - $4.95. d Air resistance and friction are often A Weight is measured in kilograms. Questions about fuels YES Here are some other questions about fuels that you The scientic explanation is accepted. where stars are born Massive (star) having lots of mass Northern hemisphere the half of (massive does not mean large) Negative describes the charge the Earth between the equator and on an electron, or the charge on the North Pole Measuring cylinder a cylinder an object that has had electrons used to measure the volume of transferred to it Nuclear energy the energy from aliquid nuclear fusion that powers the Negatively charged describes Sun and stars, or from uranium in Medium (sound/light) the an object that has had electrons nuclear power stations material that affects light or sound transferred to it by slowing it down or transferring Nuclear fusion the process of the wave Neptune a large outer planet joining hydrogen together in the made of gas, eighth from the Sun Sun and other stars that releases Meniscus the curved upper energy surface of a liquid Neutral describes an object that has no charge; its positive and Nucleus the centre of an Mercury the rocky inner planet negative charges cancel out atomthat contains neutrons nearest the Sun andprotons Neutral point (magnetic eld) Meteor a piece of rock or dust a point where there is no force on Object something that can be seen that makes a streak of light in the a magnet or magnetic material or touched night sky because two or more magnetic Observations the results of Meteorite a stony or metallic elds cancel out looking carefully at something and object that has fallen to Earth from noticing properties or changes outer space without burning up Neutralise to cancel out, when you add an equal amount of Oil a fossil fuel formed from sea Metre per second the unit of positive charge to negative charge creatures over millions of years speed, m/s Neutron star a very small, Oort cloud a cloud of comets and Microphone a device for massive star dust outside the Solar System converting sound into an electrical signal New moon the shape of moon Opaque describes objects that that we see when the Moon is in absorb, scatter, or re ect light Middle ear the eardrum and between the Earth and the Sun and do not allow any light to ossicles (small bones) that transfer passthrough vibrations from the outer ear to the Newton the unit of force inner ear including weight, symbol N Optic nerve a sensory nerve that runs from the eye to the brain Milky Way the galaxy containing Newtonmetre the unit of our Sun and Solar System moment, symbol Nm Optical bre a very ne tube of plastic or glass that uses Milliamp one thousandth of Nickel a magnetic material totalinternal re ection to anamp transmit light Night the period on one section of Minerals chemicals in rocks the Earth or other planet when it is Orbit the path taken by one body facing away from the Sun in space around another (such as Model a simpli ed description the Earth around the Sun) of a process. 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