Here are the correct answers for the worksheet, with a quick explanation for each one to help you understand why.
1. Our solar system orbits around \_\_\_\_\_\_.
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Answer: b) The sun
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Reasoning: The Sun is at the center of our solar system. All the planets, including Earth, travel in circles (orbits) around it because of its strong gravity.
2. What is a dwarf star?
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Answer: d) All of the above
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Reasoning: In astronomy, "dwarf stars" (like our Sun, which is a yellow dwarf) are main-sequence stars. Compared to giant stars, they have average or low brightness, average or low mass, and average or low size. Since all the descriptions fit, "All of the above" is the right choice.
3. Stars get their energy from \_\_\_\_\_\_.
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Answer: c) Nuclear fusion
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Reasoning: Inside a star, it is incredibly hot and pressurized. This forces hydrogen atoms to smash together and turn into helium. This process is called nuclear fusion, and it releases the huge amount of energy that makes stars shine.
4. Most of the energy in our solar system and on earth comes from \_\_\_\_\_\_.
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Answer: b) The sun
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Reasoning: The Sun is the primary power source for our neighborhood in space. It provides the light and heat that warms the Earth and allows plants to grow (which creates food energy for animals).
5. Who described how the sun generates energy?
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Answer: d) Arthur Eddington
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Reasoning: While Einstein discovered the formula ($E=mc^2$) that explains *why* mass can turn into energy, it was the astronomer Sir Arthur Eddington who proposed in the 1920s that the Sun's energy specifically comes from fusing hydrogen into helium.
6. What is the sun primarily composed of?
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Answer: c) Hydrogen
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Reasoning: The Sun is made mostly of gas. About 74% of it is Hydrogen, and most of the rest is Helium. Hydrogen is the fuel that powers the Sun.
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Final Answer:
1. b
2. d
3. c
4. b
5. d
6. c
Parent Tip: Review the logic above to help your child master the concept of 6th grade science worksheet.
