Frequently asked questions and answers of Space Physics in Universe of Physics to enhance your skills, knowledge on the selected topic. We have compiled the best Space Physics Interview question and answer, trivia quiz, mcq questions, viva question, quizzes to prepare. Download Space Physics FAQs in PDF form online for academic course, jobs preparations and for certification exams .
Intervew Quizz is an online portal with frequently asked interview, viva and trivia questions and answers on various subjects, topics of kids, school, engineering students, medical aspirants, business management academics and software professionals.
Question-1. What orbital bodies are found in our solar system?
Answer-1: Planet; dwarf planets; moons; artificial satellites
Question-2. What defines a planet?
Answer-2: A body that orbits a star, massive enough for its own gravity to make it round
Question-3. What defines a moon?
Answer-3: A natural object which orbits a planet
Question-4. What galaxy is our solar system part of?
Answer-4: Milky Way galaxy
Question-5. How is a star formed?
Answer-5: From clouds of dust and gas drawn together by gravity, which caused fusion reactions to occur
Question-6. What is a nebula?
Answer-6: A cloud of dust and gas
Question-7. What is a protostar?
Answer-7: When dust and gas are pulled together by gravity
Question-8. When does a protostar become a main sequence star?
Answer-8: When gravity is strong enough for nuclear fusion to happen, releasing energy
Question-9. What is the life cycle of a star that is a similar size to our sun?
Answer-9: Nebula; protostar; main sequence star; red giant; white dwarf; black dwarf
Question-10. What is the life cycle of a star that is much bigger than our sun?
Answer-10: Nebula; protostar; main sequence star; red super giant; supernova; neutron star or black dwarf
Question-11. What is nuclear fusion?
Answer-11: When two smaller nuclei fuse together to form one larger nucleus, releasing energy from the reaction
Question-12. What elements are fused together during the main sequence stage of a star life cycle?
Answer-12: Hydrogen nuclei fuse to form helium nuclei
Question-13. Why are stars ?stable? during the main sequence stage?
Answer-13: The outward pressure caused by fusion is balanced by the force of gravity pulling everything inwards
Question-14. What causes main sequence stars to expand and turn in red giants / super giants?
Answer-14: Hydrogen runs out and heavier elements are formed
Question-15. Which elements can be created in a star?
Answer-15: Elements up to iron
Question-16. What is a red giant?
Answer-16: A cooler, bigger star that is formed after hydrogen has run out, and heavier elements are being formed
Question-17. What is a white dwarf?
Answer-17: What is left behind when a star ejects its outer layer of dust and gas to leave behind a hot, dense solid core
Question-18. What is a black dwarf?
Answer-18: What is left behind as a white dwarf cools down and no longer emits a significant amount of energy
Question-19. What is a supernova?
Answer-19: The explosion of a massive star
Question-20. What elements are formed in a supernova?
Answer-20: Elements heavier than iron
Question-21. What is a neutron star?
Answer-21: What is left behind after a supernova has thrown the outer layers of dust and gas into space leaving a very dense core
Question-22. What is a black hole?
Answer-22: What is left behind after the supernova of a massive enough star that is so dense, not even light can escape the gravitational pull
Question-23. What shape is the shape of an ?orbit??
Answer-23: Circular
Question-24. What is an artificial satellite?
Answer-24: Something man-made which is in orbit of the Earth
Question-25. What is the force that keeps something in orbit?
Answer-25: Gravity
Question-26. In a circular orbit, how can there be changing velocity if the speed is constant?
Answer-26: It is constantly changing direction to remain in the circular orbit
Question-27. What must also be true if an object is constantly changing velocity in circular orbit?
Answer-27: It is also constantly accelerating
Question-28. What happens to the speed of an orbiting object if the radius of its orbit decreases?
Answer-28: It speeds up
Question-29. Why does the speed of an object change depending on how close it is to the thing it is orbiting?
Answer-29: The force of gravity changes so it needs to speed up/slow down to maintain a stable orbit
Question-30. What is the Doppler effect?
Answer-30: The observed change in frequency of the waves emitted by a moving source
Question-31. What is red-shift?
Answer-31: The observed increase of wavelength of light waves coming from distant galaxies
Question-32. What does red-shift tell us about the universe?
Answer-32: That the light source is moving away from us, therefore the universe must be expanding
Question-33. What does it show us that more distant galaxies have greater red-shifts than nearer ones?
Answer-33: More distant galaxies are moving away faster than nearer ones
Question-34. What is the big bang theory?
Answer-34: The universe began from a very small region that was extremely hot and dense
Question-35. How does observed red-shift support the Big Bang theory?
Answer-35: The universe is expanding, so therefore must have once been much smaller
Question-36. What have scientists observed since 1998 to suggest the rate of universe expansion is increasing?
Answer-36: By observing supernovae it shows that distant galaxies are moving away from us faster and faster
Question-37. Why is it important for scientists to keep observing changes in the universe?
Answer-37: Observations allow them to obtain data, which can then either confirm or reject current theories
Question-38. What do scientists currently think the universe is made up of?
Answer-38: Dark matter and dark energy
Frequently Asked Question and Answer on Space Physics
Space Physics Interview Questions and Answers in PDF form Online
Space Physics Questions with Answers
Space Physics Trivia MCQ Quiz
