New Pupil Toolkit for GCSE (9-1) Astronomy GCSE (9-1) Astronomy Pupil Worksheet Week 41 Topic 4.5 Spec. refs 4.15, 4.16, 4.17, 4.18, 4.19, 4.20, 4.21 1. Which of the following pairs indicate identical times? x A Apparent Solar Time and UT x B GMT and Daylight Saving Time x C Local Mean Time and Mean Solar Time x D UT and Daylight Saving Time (1) 2. Which of the following Astronomy students is correct? Chico: At longitudes that are Roxanna: At longitudes that are east of Greenwich, the Local east of Greenwich, the Local Mean Time is always later than Mean Time is always earlier than GMT. GMT. Your answer: . (1) 3. By how many degrees does the Earth rotate on its axis in 60 minutes? Your answer: . (1) New Pupil Toolkit for GCSE (9-1) Astronomy © Mickledore Publishing 2017 New Pupil Toolkit for GCSE (9-1) Astronomy 4. How long does it take for the Earth to rotate on its axis through an angle of 30°? Your answer: . (1) 5. How many minutes does it take for the Earth to rotate through an angle of 1°? Your answer: . min (1) 6. Erik and Sally are studying Astronomy in different parts of the world; at an agreed time they communicate with each other via WhatsApp. Erik says that his Local Mean Time is 14:32; Sally says that her Local Mean Time is 17:48. (a) Which student is further east? . (1) (b) Determine the difference in longitude between the two students. (2) 7. Which of the following Astronomy students is correct? Husnain: At longitudes that are Chloe: At longitudes that are west of Greenwich, the Local west of Greenwich, the Local Mean Time is always later than Mean Time is always earlier than GMT. GMT. Your answer: . (1) 8. A student used a shadow stick to determine that her local noon occurred at 11:46 GMT. On the day of the student’s experiment, the Equation of Time was - 4 min. Determine the longitude where the student carried out her experiment. (2) New Pupil Toolkit for GCSE (9-1) Astronomy © Mickledore Publishing 2017 New Pupil Toolkit for GCSE (9-1) Astronomy 9. A student used a shadow stick to show that the Sun was highest in the sky at 12:02 GMT on a particular day. On the day of the student’s experiment, the Equation of Time was +6 min. Determine the longitude where the student carried out his shadow stick experiment. (2) 10. Anne-Marie and Liam observe the Sun from longitudes 12° E and 8° W respectively. Anne-Marie sees the Sun culminate at 11:10 GMT. At what time will Liam observe the culmination of the Sun? Choose from: 09:50 GMT 11:10 GMT 12:30 GMT Your answer: . (1) 11. The time difference between most of the world’s adjacent time zones is x A 30 min x B 60 min x C 90 min x D 120 min (1) 12. Which method of determining longitude at sea relied on a knowledge of the position of the Moon relative to the stars? Choose from: lunar distance method lunar eclipse method lunar crater method Your answer: . (1) New Pupil Toolkit for GCSE (9-1) Astronomy © Mickledore Publishing 2017 New Pupil Toolkit for GCSE (9-1) Astronomy 13. Who invented the H4 marine chronometer? Choose from: John Harrison George Harrison Harrison Ford Your answer: . (1) 14. A ship has been sailing for some time and on one particular day, the captain uses measurements of the Sun’s altitude in the sky to deduce that Local Mean Time is 12:00 noon. The U.S. Brig Niagara. Image courtesy of Tall Ships Celebration: Bay City. The ship carries an accurate clock that tells the captain that the time in Greenwich at that moment is 14:20 GMT. Determine the longitude of the ship. (2) 15. The zero of longitude is defined as the meridian that runs through x A Berlin x B Greenwich x C New York x D Ulaanbaatar (1) New Pupil Toolkit for GCSE (9-1) Astronomy © Mickledore Publishing 2017 New Pupil Toolkit for GCSE (9-1) Astronomy Solutions 1. C (1 mark) 2. Chico (1) 3. 15° (1) 4. 2.0 h (1) 5. 4.0 min (1) 6 (a) Sally is further east (1) (b) 49° (2); if incorrect, award (1) mark for Local Mean Time difference of 3 h 16 min. 7. Chloe (1) 8. 2.5° (1) west (1) 9. 1.0° (1) west (1) 10. 12:30 GMT (1) 11. B (1) 12. lunar distance method (1) 13. John Harrison (1) 14. 35° (1) west (1) 15. B (1) Your score: / 20 New Pupil Toolkit for GCSE (9-1) Astronomy © Mickledore Publishing 2017 .