1 Which causes error in measurement? A Instrument fault B Human mistake C Environmental effects D All of these
2 Ethan is studying SI base units. He knows that the SI base unit for time is the second. Which of the following is the SI base unit for length? A Kilometer B Centimeter C Meter D Millimeter
5 Hina is learning about scalar and vector quantities. She understands that vector quantities have both magnitude and direction. Which of the following is a vector quantity? A Speed B Mass C Distance D Displacement
6 Mohamed is studying prefixes. He learns that prefixes are used to denote multiples and submultiples of SI units. What does the prefix 'kilo' represent? A 10^3 B 10^6 C 10^-3 D 10^-6
7 Diana is learning about oscillations and waves. She understands that oscillations are periodic motions. Which of the following is an example of an oscillation? A A moving car B A pendulum C A rolling ball D A flying bird
8 Ibrahim is studying the addition of vector quantities. He learns that vectors can be added graphically. What is the method of adding vectors head-to-tail called? A Vector addition B Vector resolution C Resultant vector D Component method
11 Khalid is studying the screw gauge. He learns that the screw gauge has a pitch and a circular scale. What is the pitch of a screw gauge? A The distance moved by the spindle in one rotation B The number of divisions on the circular scale C The length of the screw D The diameter of the screw
12 Bongani is learning about rounding off numbers. He understands that numbers are rounded to a certain number of significant figures. What is 3.14159 rounded to 3 significant figures? A 3.14 B 3.142 C - D -
13 Laura is learning about errors in measurement. She understands that systematic errors can be minimized by calibration. Which of the following is a way to reduce systematic errors? A Taking multiple readings B Calibrating the instrument C Using a more precise instrument D Ignoring the error
14 Xia is learning about random errors. She understands that random errors are unpredictable and vary in magnitude. Which of the following is an example of a random error? A A faulty scale B Reading a scale at an angle C Slight variations in temperature affecting measurement D Zero offset
16 Zayn is learning about rounding off numbers. He understands that when rounding off, if the next digit is 5 or more, the digit is increased by 1. What is 6.785 rounded to two decimal places? A 6.78 B 6.79 C 6.80 D 6.70
17 Mohamed is studying precision and accuracy. He learns that accuracy can be improved by using better instruments and methods. Which of the following affects the accuracy of a measurement? A Instrument calibration B Observational skill C Environmental conditions D All of the above
20 David is learning about thermodynamics. He understands that thermodynamics deals with heat and temperature and their relation to energy. Which of the following is a concept in thermodynamics? A Entropy B Wave interference C Nuclear fission D Relativity
23 Yara is studying precision and accuracy. She understands that precision refers to the consistency of measurements, while accuracy refers to how close a measurement is to the true value. Which of the following statements is true? A Precise measurements are always accurate B Accurate measurements are always precise C Precision and accuracy are the same D A measurement can be precise but not accurate
25 Xia is studying precision and accuracy. She understands that precision is about the repeatability of measurements. Which of the following describes a precise measurement? A Measurements that are close to the true value B Measurements that are close to each other C Measurements that are all the same D Measurements that have no errors