1 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
2 Which causes error in measurement? A Instrument fault B Human mistake C Environmental effects D All of these
3 Acceleration is defined as: A Change in speed B Change in velocity per unit time C Speed multiplied by time D Distance divided by time
4 Scientific notation is used to express: A Very small and very large numbers B Only small numbers C Only large numbers D Whole numbers
5 Rania is learning about the vernier caliper. She understands that the vernier caliper is used for more precise measurements. What is the least count of a typical vernier caliper? A 0.1 mm B 0.01 mm C 0.001 mm D 1 mm
6 Zero error occurs when: A Scale is broken B Instrument reads zero incorrectly C Observer is careless D Value is large
7 Resultant of two vectors at right angles is found using: A Addition law B Subtraction law C Pythagoras theorem D Newton’s law
9 Xia is analyzing a speed-time graph. The graph shows a line that is increasing. What does this indicate about the acceleration? A Acceleration is positive B Acceleration is negative C Acceleration is zero D Acceleration is constant
10 Bilal is learning about quantum physics. He understands that quantum physics deals with the behavior of matter and energy at very small scales. Which of the following is a topic studied in quantum physics? A Orbital motion of planets B Behavior of electrons in atoms C Wave propagation in water D Thermodynamic processes
11 Which instrument is commonly used to measure speed of vehicles? A Thermometer B Speedometer C Barometer D Ammeter
14 Uma is analyzing a distance-time graph. The graph is a straight line with a positive slope. What does the slope of the graph represent? A Speed B Velocity C Acceleration D Displacement
15 Julia is learning about measuring instruments. She understands that the vernier caliper is used to measure internal and external diameters. What is the main advantage of a vernier caliper over a meter rule? A It is cheaper B It provides more precise measurements C It is easier to use D It measures larger lengths
18 Ming is analyzing a speed-time graph. The graph shows a line with a positive slope. What does this indicate about the motion? A The object is decelerating B The object is accelerating C The object is moving with constant speed D The object is at rest
21 Carlos is studying the branches of physics. He learns that quantum physics deals with the behavior of matter and energy at the atomic and subatomic level. Which of the following phenomena is studied in quantum physics? A Diffraction of light B Photoelectric effect C Planetary motion D Sound propagation
22 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
25 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
27 Average speed is defined as: A Final speed minus initial speed B Total distance divided by total time C Displacement divided by time D Instantaneous speed at a point
28 If an object covers equal distances in unequal intervals of time, its motion is: A Uniform B Non-uniform C Circular D Periodic
29 Non-uniform velocity occurs when: A Speed and direction both remain constant B Speed or direction changes C Distance is zero D Acceleration is zero
30 The value of acceleration due to gravity on Earth is approximately: A 9.8 m/s B 9.8 m/s² C 8.9 m/s² D 10 m/s