SCIENCE (Grade 12)

1. What force pulls objects toward the center of the Earth? A. Magnetism B. Friction C. Gravity D. Tension Answer: C 2. Which part of the cell controls the activities of the cell? A. Ribosome B. Nucleus C. Mitochondrion D. Cell membrane Answer: B 3. What is the main function of the mitochondria? A. Protein synthesis B. Energy production C. Waste removal D. Cell protection Answer: B 4. Which type of blood vessel carries blood away from the heart? A. Veins B. Capillaries C. Arteries D. Alveoli Answer: C 5. What unit is used to measure force in physics? A. Joule B. Watt C. Newton D. Pascal Answer: C 6. Which organelle is responsible for photosynthesis in plant cells? A. Vacuole B. Chloroplast C. Nucleus D. Lysosome Answer: B 7. What law states that for every action, there is an equal and opposite reaction? A. Law of Gravitation B. First Law of Motion C. Second Law of Motion D. Third Law of Motion Answer: D 8. What happens to the speed of an object when net force acting on it increases? A. It decreases B. It remains constant C. It increases D. It becomes zero Answer: C 9. Which cell structure regulates what enters and leaves the cell? A. Cell wall B. Cytoplasm C. Cell membrane D. Ribosome Answer: C 10. What type of energy does a moving object have? A. Potential energy B. Thermal energy C. Chemical energy D. Kinetic energy Answer: D