Q2 EXAM REVISION 7TH

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Across
  1. 4. Which of the following broad-based field of technical study prepares students for jobs requiring 21st-century knowledge and skills?
  2. 5. A test model of a product is known as a(n) ______.
  3. 6. What is the point in orbit when the Earth is farthest to the Sun?
  4. 8. What do astronomers study?
  5. 9. What unit of time is based on Earth’s revolution?
  6. 11. Which scientific instrument is sensitive enough to detect a planet transiting a star?
  7. 16. What is extracted by mining?
  8. 17. What change 12,000 years ago caused the human population to increase tenfold?
  9. 20. Which group of planets are smallest in size?
  10. 21. Mercury,Mars,Venus and Earth are
  11. 22. When it is summer in the Northern Hemisphere, what season is it in the Southern Hemisphere?
  12. 23. What has not cleared its neighboring region of other objects, so is now considered as dwarf planet?
  13. 26. Which model of the universe was theorized by the ancient Greeks?
  14. 28. What is the point in orbit when the Earth is closest to the Sun?
  15. 29. Jupiter,Uranus,Saturn,Neptune are
Down
  1. 1. Hydrogen atoms join together to form ______ in sun.
  2. 2. What powers the Sun?
  3. 3. If a design has a flaw the design team will __________ the design?
  4. 4. What are powered by the sudden release of magnetic energy stored in the corona?
  5. 7. Which of Earth’s spheres would you mine for copper, gold, and diamonds?
  6. 10. __________ are not generally spherical.
  7. 12. Which layer shields the earth by absorbing some of the UV light that harms living things?
  8. 13. Where on the planet would you receive more direct sunlight?
  9. 14. What are planetary orbits shaped like?
  10. 15. Which group of planets are closest to the sun?
  11. 16. Which planet is also known as the red planet?
  12. 18. The Sun’s rays are perpendicular to the Equator, causing 12 hours of daylight on both Northern and Southern Hemispheres.
  13. 19. Which of the four inner planets has one moon?
  14. 24. Which group of planets have more rings and moons?
  15. 25. Presence of what makes the Earth special amongst all the planets?
  16. 27. ___________ originate from the Kuiper belt, from the Oort cloud, from interstellar space.