1 George is studying internal energy and temperature of a substance. He learns that internal energy is the total energy of particles in a substance. What is the internal energy of an object related to? A Only temperature B Only kinetic energy C Kinetic and potential energy of particles D Only potential energy
2 Random errors can be reduced by: A Single reading B Changing instrument C Taking average of readings D Ignoring readings
3 The closeness of magnetic field lines indicates: A Direction of field B Strength of field C Type of magnet D Mass of magnet
4 Carlos is learning about elasticity. He understands that Young's modulus is a measure of the stiffness of a material. What is the unit of Young's modulus? A Newton B Pascal C Joule D Watt
5 Laura is studying force and change in momentum. She learns that force equals the rate of change of momentum. If the momentum of an object changes from 10 kg m/s to 30 kg m/s in 2 seconds, what is the force? A 5 N B 10 N C 15 N D 20 N
6 Xia is learning about the effects of the type of glass used in a thermometer on its linearity. She understands that different glasses expand differently. Which glass expands more uniformly? A Quartz glass B Borosilicate glass C Soda-lime glass D Lead glass
7 Khalid is studying the variation in color of crystals with temperature. He learns that some crystals change color when heated. Which of the following is an example of a thermochromic material? A Glass B Liquid crystals C Iron D Copper
9 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
10 Scientific knowledge grows mainly through ____. A Arguments B Experiments and discussion C Opinions D Traditions
12 Scientific laws are valid as long as they are ____. A Popular B Not challenged C Supported by experiments D Old
14 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
15 What is meant by work done in physics? A Force applied without movement B Movement without force C Force causing displacement D Energy stored in an object
16 Which of the following is an example of action-reaction pair? A Weight and mass B Push on wall and wall pushing back C Friction and gravity D Speed and velocity
17 Julia is studying nuclear fuels. She knows that nuclear energy is obtained from the nucleus of atoms. Which of the following is a nuclear fuel? A Coal B Uranium C Natural gas D Petroleum
18 Magnetic field lines never: A Intersect each other B Form closed loops C Exist outside magnet D Exist inside magnet
19 Rania is studying net force. She understands that net force is the vector sum of all forces. If forces of 8 N and 6 N act at right angles to each other, what is the magnitude of the net force? A 10 N B 14 N C 48 N D 2 N
21 Sam is studying the Earth's magnetic field. She knows that the Earth behaves like a giant magnet. What is the direction of the Earth's magnetic field inside the Earth? A From north to south B From south to north C From east to west D From west to east
22 Sam is studying efficiency. She knows that efficiency is the ratio of useful output energy to input energy. A machine has an input of 500 J and an output of 300 J. What is the efficiency of the machine? A 60% B 50% C 30% D 100%
23 Julia is studying the manometer. She learns that a manometer is used to measure the pressure of gases. Which type of manometer is most common? A Mercury manometer B Water manometer C U-tube manometer D Digital manometer
24 Ming is studying efficiency. He knows that efficiency is a measure of how well a machine converts input energy to useful output. If a machine has an efficiency of 40%, what percentage of input energy is wasted? A 40% B 60% C 100% D 0%
25 Yusuf is studying the stroking method of inducing magnetism. He knows that stroking a steel bar with a magnet magnetizes it. What happens to the domains during stroking? A They become randomly oriented B They align in one direction C They are destroyed D They remain unchanged
26 Fatima is studying thermal physics. She learns that thermal physics deals with heat and temperature. Which of the following is a concept in thermal physics? A Entropy B Electric charge C Magnetic flux D Gravitational force
27 Steel is commonly used to make permanent magnets because it: A Is cheap B Has high retentivity C Is soft D Conducts electricity
29 Which sub-field deals with electric charges? A Mechanics B Electromagnetism C Thermodynamics D Optics
30 Ethan is learning about geophysics. He understands that geophysics studies the Earth's interior. Which of the following is a method used in geophysics? A Seismic wave analysis B Telescope observation C Chemical analysis of rocks D Biological sampling