G10 Science Reviewer PDF

G10 Q3 Reviewer in Science Directions: Read the questions carefully. Choose the letter of the correct answer. Questions: 1. What is the main function of thin lenses in optics? A) To scatter light into multiple directions B) To focus light and create precise images C) To absorb...

G10 Q3 Reviewer in Science Directions: Read the questions carefully. Choose the letter of the correct answer. Questions: 1. What is the main function of thin lenses in optics? A) To scatter light into multiple directions B) To focus light and create precise images C) To absorb light for energy conversion D) To magnify shadows Answer: 2. Which property of a ray passing through the center of a lens is correct? A) The ray will reflect entirely B) It will pass through without bending C) The ray will bend sharply D) It will divide into multiple rays Answer: 3. What happens to light rays entering a converging lens parallel to the principal axis? A) They remain parallel after exiting B) They converge at the focal point on the opposite side C) The rays scatter in all directions D) They form a shadow within the lens Answer: 4. How is an image projected onto a screen described? A) It is always virtual B) It forms a real image C) It is a shadow D) It is a diffused image Answer: 5. Which of these modern devices relies on magnetism? A) Water filters B) Solar panels C) Hard drives in electronics D) Books Answer: 6. What kind of energy transformation occurs in an electric motor? A) Electrical energy changes to mechanical energy B) Mechanical energy is converted to electrical energy Copyright © Richmindale in partnership with IFFOAID, USA  G10 Q3 Reviewer in Science C) Magnetic energy is stored for later use D) Transformers are powered directly Answer: 7. What natural sources are commonly used to power generators? A) Steam, wind, or hydropower B) Air pressure systems C) Magnetic fields alone D) Chemical energy reserves Answer: 8. Which part of a transformer adjusts the electrical voltage? A) Both primary and secondary coils B) The primary coil only C) The magnetic field exclusively D) The wire insulation layer Answer: 9. What is true about the interaction between magnetic poles? A) Unlike poles will repel each other B) Like poles attract naturally C) Magnets do not have separable poles D) Opposite poles attract Answer: 10. Which hormone regulates FSH levels in males? A) Prolactin B) Estradiol C) Oxytocin D) Inhibin Answer: 11. Which hormone triggers the release of FSH and LH? A) GnRH from the hypothalamus B) Oxytocin C) Testosterone D) Prolactin Answer: 12. What is the primary function of LH in males? A) To regulate milk production B) To inhibit the production of sperm C) To stimulate testosterone synthesis D) To create energy stores Answer: 13. During the proliferative phase of the menstrual cycle, what occurs? A) Uterine lining sheds Copyright © Richmindale in partnership with IFFOAID, USA  G10 Q3 Reviewer in Science B) The uterine lining thickens under estrogen influence C) Progesterone production increases D) Ovulation occurs Answer: 14. What kind of feedback does high estrogen during ovulation cause? A) Negative feedback B) Neutral feedback C) Positive feedback D) No feedback Answer: 15. What is the role of the hormone hCG during pregnancy? A) To regulate ovulation B) To maintain the corpus luteum C) To stimulate milk production D) To thicken the uterine lining Answer: 16. How does a ray passing through the focal point of a diverging lens behave? A) Exits parallel to the principal axis B) Passes straight through the center C) Bends away from the lens D) Remains within the lens Answer: 17. What type of image forms when light rays actually converge? A) Virtual image B) Real image C) Scattered image D) Diffused reflection Answer: 18. Which phase of the menstrual cycle involves the shedding of the uterine lining? A) Proliferative phase B) Ovulatory phase C) Menstrual phase D) Secretory phase Answer: 19. Which hormone is primarily responsible for milk ejection during breastfeeding? A) Oxytocin B) Prolactin C) LH D) Estradiol Answer: 20. The corpus luteum mainly functions to: A) Stimulate FSH release Copyright © Richmindale in partnership with IFFOAID, USA  G10 Q3 Reviewer in Science B) Maintain the uterine lining with progesterone secretion C) Develop ovarian follicles D) Release LH Answer: 21. Which device uses an electric motor for its operation? A) A compass B) A fan C) A camera D) A solar panel Answer: 22. What happens to light rays entering a converging lens? A) They scatter inside the lens B) They meet at the focal point on the opposite side C) They travel parallel after exiting D) They form a virtual image inside the lens Answer: 23. What is the primary androgen hormone found in males? A) Estradiol B) Testosterone C) Progesterone D) Inhibin Answer: 24. Which hormone is responsible for ovulation in the female reproductive cycle? A) LH B) FSH C) Oxytocin D) Progesterone Answer: 25. What phase of the menstrual cycle is characterized by corpus luteum activity? A) Menstrual phase B) Ovulatory phase C) Secretory phase D) Proliferative phase Answer: 26. How does a transformer primarily adjust voltage? A) By generating heat B) By changing magnetic field direction C) Through two sets of wire coils D) By producing electricity directly Answer: 27. Which property of a ray passing through a lens center is true? A) The ray remains unbent Copyright © Richmindale in partnership with IFFOAID, USA  G10 Q3 Reviewer in Science B) It bends sharply towards the focal point C) It splits into multiple paths D) It reflects back to the source Answer: 28. Which feedback mechanism involves hormones like FSH and LH during ovulation? A) Positive feedback B) Negative feedback C) Neutral feedback D) No feedback Answer: 29. Which hormone regulates sperm production in males by inhibiting FSH? A) Inhibin B) Prolactin C) Testosterone D) Estradiol Answer: 30. What is the role of a real image in optics? A) It forms a shadow B) It can be projected onto a screen C) It cannot exist in lenses D) It is visible only under certain conditions Copyright © Richmindale in partnership with IFFOAID, USA