1. Read the paragraph then fill in the blanks with the correct word/s. Choose your answer from the box below then shade the corresponding letter on the answer sheet provided. It all starts with 1. , cloud of gas and dust particle in outer space. Due to the force of gravity, the 2._ - gas is pulled together and eventually became a protostar. Nebular fusion occurs at the center of the protostar and becomes stable. During this time, hydrogen is converted into 3. forming main sequence star. The size of the star can be average or massive. A massive main sequence star that runs out of hydrogen fuel will begin to expand and cool down. This is 4-_ the biggest star in the universe. The red super giant continues to fuse with heavy elements and stops when 5. is converted in the core of the star. At this point, red super giant will become a supernova after hundreds of years. A. helium C iron E. red super giant B. hydrogen D. nebula Il. Match the descriptions in Column A with the terms in Column B. COLUMN A COLUMN B 6. the formation of elements in the center A. R-process of a star B. S-process 7. dispersion of heavy elements into C. stellar nucleosynthesis space leading to formation of clements D. supernova explosion heavier than iron E. tri-alpha process 8. it happens when there is a slow rate of capturing neutron while there is a faster rate of radioactive decay 9. means that there is faster rate of capturing neutron before it undergoes radioactive decay 10. it happens in red pant star where three Helium-4 are converted into carbon Ill. Analyze the following statements/questions. Choose the letter of the correct answer. 11. It is a one-dimensional point which contains a huge mass on an infinitely small space, where density and gravity become infinite and space-time curves infinitely, and where the laws of physics as we know them cease to operate. A. inflation C. recombination B. nucleosynthesis D. singularity 12. It was the nuclear fusion and the formation of new nuclei actions in the early stages of the expansion of the universe. A. inflation C. recombination B. nucleosynthesis D. singularity 13. It is the formation of the capture of free electrons by the cations in a plasma A. inflation C. recombination B. nucleosynthesis D. singularity 14. He synthesized element with atomic number 43 using a linear particle accelerator. A Dmitri Mendeleev C. Ernest Rutherford B. Ernest Lawrence D. Henry Mosely 15. He noticed that shooting electrons at elements caused them to release x-rays at unique frequencies. A. Dmitri Mendeleev C. Ernest Rutherford B. Ernest Lawrence D. Henry Mosely 16. In 1919, he successfully carried out a nuclear transmutation reaction as a process of transforming one element or isotope into another element. A. Dmitri Mendeleev C. Ernest Rutherford B. Ernest Lawrence D. Henry Mosely 17. What do you call a device that is used to speed up the protons to overcome the repulsion between the protons and the target atomic nuclei by using magnetic and electrical fields? A. microscope C. particle decelerator B. particle accelerator D. particle reactor 18. It is equal to the number of protons in an atom. A. atom C. electron B. atomic number D. mass number 19. He created a classification of elements based on their atomic weight. A. Dmitri Mendeleev C. Ernest Rutherford B. Ernest Lawrence D. Henry Mosely 20 It is the term used to identify elements with atomic numbers greater than 92. A. heavy elements C. uranium
