1. The largest planet in the solar system is a. Mercury b. Mars c. Jupiter d. Saturn: c2. Which of the following objects is not a member of the solar system? A. Moon b. Pluto c. Neighboring d. Neptune answer: what is the rotation cycle of c3. Earth? A. 24-hour b. 365-day c. 28-day d. 46 billion-year answer: which of the following constellations does not belong to the zodiac? A. Leo b. Orion c. Scorpion d. Golden bull answer: the main mission of the b5. Hubble telescope? A. Solar b. Earth c. Moon d. Deep space answer: which of the following objects is a dwarf in the solar system? A. Earth b. Mars c. Jupiter's answer: which of the following planets in the solar system has the greatest known number of satellites? A. Earth b. Mars c. Jupiter d. Saturn answer: which of the following are the least known planets in the solar system? A. Earth b. Mars c. Mercury d. Venus answer: which of the following objects is the largest known satellite in the solar system? A. Lunar b. Gymnasium iii. C. Astronaut d. Seaguard answer: b10. Which of the following is the smallest satellite known in the solar system? The eight planets in the solar system are: mercury, venus, earth, mars, jupiter, saturn, uranus and . Answer: neptune 2. The central area of the galaxy is known as . Answer: silver 3. The only planet in the solar system without a magnetic field is . Answer: venus 4. The largest planetary ring system known in the solar system is . Answer: saturn 5. The moon has the same bus cycle as the rotation cycle, known as . Answer: tide locks 6. The outermost atmosphere is known as . Answer: the planets closest to the sun in the fugitive layer 7. Answer: mercury 8. In the solar system, the planets most far from the sun are . Answer: neptune 9. The brightest planet in the solar system is . Answer: venus 10. The darkest planet in the solar system is . Answer: pluto three, short answers (10 minutes each, 30 minutes) 1. Describe the structure of the sun and explain how its energy is generated. Answer: the sun consists mainly of the core, the irradiation layer, the troposphere and the pv layer. The energy of the sun comes from its core, from a nuclear fusion reaction, with hydrogen atoms fusion into helium atoms, releasing huge amounts of energy that are radiationed into the surface of the sun in the form of light and heat, then transmitted through the irradiation layer and troposphere, and eventually into space in the form of light. 2. Explain what a black hole is and describe its characteristics. Answer: the black hole is an extremely dense object of immense mass and gravity so that even light cannot escape it. The boundaries of the black hole are known as the event horizon, and no material or radiation can return once it has crossed the event horizon. The black hole does not glow and therefore cannot be observed directly, but can be detected indirectly by its effect on the surrounding substance. 3. Describe what is a star's life cycle and outline several different stages of a star. Answer: the life cycle of a star refers to the entire process from its formation to its ultimate death. Several different phases of a star include: the original star phase, at which the star gradually rises in temperature and pressure by gravitational contraction; the primary sequence stage, at which the star burns hydrogen steadily through nuclear fusion, releasing energy; the red giant phase, at which the outer layer expands into a red giant after the core of the star has run out of hydrogen; the white dwarf phase, at which the hot core left behind after the star's outer layer has been ejected, gradually cools into a white dwarf; and the neutron or black hole phase, at which the larger star may explode supernovaically at the time of death, leaving debris that may turn into a neutron or black hole. Assuming an average distance from earth to the sun of 1 astronomical unit (au), 1au equals approximately 149,597,870. 7 kilometres. If a spacecraft leaves the earth for the sun at 10 kilometres per second, how long does it take for it to reach the sun? Answer: time taken for spacecraft to reach the sun = 149,597,870. 7 km/10 km/sec14,959,787. 07 seconds. Turn the seconds into days and get ≈175. 42 days. 5. Topics of discussion (20 points each, 20 minutes) 1. Address the significance of human exploration of the universe and look forward to possible directions for future exploration of the universe. Answer: the significance of human exploration of the universe lies in satisfying curiosity about the unknown, promoting the development of science and technology, finding new resources and places of residence, and understanding our place in the universe and its origins. Possible directions for future space exploration include:
