Physics Concepts Review: Prefixes, Units, and Errors
Refresh your understanding of prefixes, base units, and measurements in A-level Physics with quick-fire questions on values, quantities, and uncertainties. Explore key concepts like prefix conversions, SI units, and error types for better comprehension.
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KS5 Spaced Learning Practice Quick-fire Questions & Quizlet Links AQA Mr Powell
Prefixes What is the value of the prefix T (tera) 10 What is the value of the prefix G (giga) 10 What is the value of the prefix M (mega) 10 What is the value of the prefix k (kilo) 10 What is the value of the prefix d (deci) 10 What is the value of the prefix c (centi) 10 Work through the questions on the list on a projector OR print and cover. What is the value of the prefix m (milli) 10 What is the value of the prefix (micro) 10 What is the value of the prefix n (nano) 10 QR Codes, give a quick quiz on the ideas What is the value of the prefix p (pico) 10 Animated Science 2020
Quantities, Units and Conversions What six base units of the SI system are used in A Level Physics? What six base quantities of the SI system are used in A Level Physics? What is the base unit of mass? What is the base unit of length? What is the base unit of time? What is the base unit of current? What is the base unit of temperature? What is the SI unit of potential difference? What are the SI units of density? What is the SI unit of energy? What is the SI unit of power? What is the SI unit of charge? What is 1m in mm ? What is 1m in cm ? What is 1km in m ? What is 1cm in mm ? There are 10 free charge carriers per m of a material. How many are there per mm ? 10 particles strike each mm of a surface per second. How many strike 1m of the surface per second? If there is 1 particle per mm , how many are there per m ? Water has a density of 1000kgm . What is this in kgcm ? Water has a density of 1000kgm . What is this in gcm ? What six base units of the SI system are used in A Level Physics? metre, kilogram, second, Ampere, Kelvin, Mole length, mass, time, electric current, absolute temperature, amount of substance. kg m s A K V kgm J W C 10 mm 10 cm 10 m 10 mm 10 10 10 10 1 metre, kilogram, second, Ampere, Kelvin, Mole Animated Science 2020
Measurements, errors and uncertainties Part 1 Something that must be kept constant to prevent it affecting the dependent variable What is a control variable? What is meant by the repeatability of results? Similar results would be obtained from repeats of the same measurement from the same experimental set up. What is meant by the reproducibility of results How can you ensure a metre rule is held vertically? Similar results would be obtained from repeats by different people with different equipment. Use a plumb line, set square or spirit level Ensure eye, object and scale are all in line with each other OR ensure object and scale are directly adjacent to each other How do you avoid parallax error? What is meant by the term random error? Errors that cause the measurement to vary in unpredictable ways. An error that causes the measurements to differ from the true value by a consistent amount. What is a systematic error? An error that occurs due to the measuring instrument reading a non- zero reading when the measured quantity is zero. What is a zero error? What is meant by the accuracy of a result? What is meant by the precision of results? What is meant by the resolution of a measuring instrument? What determines the resolution when using a multimeter? What is the resolution of a metre rule? 1mm What is the resolution of vernier calipers? What is the resolution of a micrometer 0.01mm How close a measurement is to the 'true' or accepted value How close repeated measurements are to each other. The smallest change in quantity that can be measured. The scale selected. 0.1mm Animated Science 2020
Measurements, errors and uncertainties Part 2 How do you find the absolute uncertainty from repeated readings? the range of the repeats How do you estimate uncertainty when repeated results are identical the resolution of the instrument How do you calculate percentage uncertainty? What do you do to the uncertainties when quantities are added or subtracted? What do you do to the uncertainties when quantities are multiplied or divided? What do you do to the uncertainties when a quantity is raised to a power? How do you find the uncertainty in a gradient? (Absolute uncertainty 'calculated OR measured' value) 100 The absolute uncertainties are added together The percentage uncertainties are added together The percentage uncertainty is multiplied by that power (gradient of the line of best fit gradient of the line of worst fit) The steepest or shallowest line that passes through the error bars. What is a line of worst fit? Lines to show the range of the absolute uncertainty of each data point on a graph What are error bars? Animated Science 2020
