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How many centimeters are there in one kilometer?

How many centimeters are there in one kilometer?. QUESTION. 100 1,000 10,000 100,000 1 × 10 6. Scientific notation is used in science because. QUESTION. it makes it easy to write big or small numbers. all astronomical distances are expressed in metric units.

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How many centimeters are there in one kilometer?

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  1. How many centimeters are there in one kilometer? QUESTION • 100 • 1,000 • 10,000 • 100,000 • 1×106

  2. Scientific notation is used in science because QUESTION • it makes it easy to write big or small numbers. • all astronomical distances are expressed in metric units. • it makes conversions between units easy. • all of the above.

  3. The average distance from Earth to the Sun is QUESTION • 1 ly • 1 million km • 1 million miles • 1 billion km • 150 million km

  4. The sun is QUESTION • a star which generates its own energy. • 1 AU from Earth. • visible by its own light emission. • all of the above.

  5. 2.9 × 107 is the same as QUESTION • 2.9 thousand • 29 thousand • 290 thousand • 2.9 million • 29 million

  6. Arrange the following distances in order from smallest to largest.I. kilometerII. light-yearIII. yardIV. Astronomical unit QUESTION • I, II, III, IV • IV, III, II, I • III, I, IV, II • II, I, IV, III • III, I, II, IV

  7. If light takes 8 minutes to travel from the sun to Earth and over 4 hours to travel from the sun to the planet Neptune, what is the distance from the sun to Neptune? QUESTION • 5 AU • 30 AU • 30 ly • 5 ly • 0.6 ly

  8. In the diagram below, what is the diameter of Jupiter? QUESTION • About 7.0 × 104 km. • About 7.0 × 105 km. • About 1.4 × 104 km. • About 1.4 × 105 km. • About 3.5 × 106 km.

  9. The speed of light is 3.0 × 105 km/sec, and it takes light 1.3 sec for light to travel from the moon to Earth. From this information, what is the distance to the moon? QUESTION • 390,000 km • 230,000 km • 3.9 km • 2.3 km • 4.3 × 105 km

  10. A typical galaxy like our Milky Way galaxy contains QUESTION • primarily planets. • gas only. • stars (some with planets), gas and dust. • a single star and planets. • thousands of superclusters.

  11. The Milky Way Galaxy QUESTION • contains about 100 billion stars. • is about 200 light-years in diameter. • is the largest known object in the universe. • all of the above. • 1 and 3.

  12. The Milky Way Galaxy is QUESTION • a spiral galaxy. • part of a cluster of galaxies that contains a few dozen galaxies. • about 80,000 light years in diameter. • all of the above.

  13. If the Earth were represented as a basketball (~10 in) and the Moon as a baseball (~3 in) then, to order of magnitude, what size would best represent the diameter of the Sun? QUESTION • 10 ft • 100 ft • 1000 ft • 10000 ft

  14. Which sequence is correct when ordered by increasing size? QUESTION • Earth, Solar System, Milky Way Galaxy, clusters of galaxies • Solar System, Earth, galaxy clusters, Milky Way Galaxy • Earth, Milky Way Galaxy, Solar System, galaxy clusters • Galaxy clusters, Solar System, Milky Way Galaxy, Earth

  15. How is a planet different from a star? QUESTION • Planets are larger than stars. • Planets reflect light while stars produce their own light. • Stars move faster in the sky than planets. • Planets are brighter than stars.

  16. If the distance from the Sun to the Earth is represented by roughly 15 meters, then the distance from the Earth to the Moon on the same scale would be QUESTION • about 30 meters. • about 10 meters. • about 1 meter. • small than your hand.

  17. Assume the size of the Sun is represented by a softball with the Earth about 15 meters (150 million km or 8 light minutes) away. Roughly how far away, to scale, would the nearest stars to the Sun be? QUESTION • About the distance between New York and Boston (330 km). • 100 meters away. • About the distance across the United States from New York to Los Angeles (4300 km). • About the distance across 50 football fields (50 x 100 m).

  18. If the distance to the nearest star is 4.2 light-years, then QUESTION • the star is 4.2 million AU away. • the light we see left the star 4.2 years ago. • the star must have formed 4.2 billion years ago. • the star must be very young. • the star must be very old.

  19. Assume a 100 yard football field represents the 14 billion year history of the universe with one end as the origin and the other end representing the present. The existence of human beings will extend from _____ to the present “goal line.” QUESTION • the 50 yard line • the 5 yard line • the one yard line • the one inch line

  20. Which of these is NOT a common misconception? QUESTION • A light year is a unit of time. • Stars look like disks when seen through a telescope. • A galaxy is a star plus its planets. • All of the above are misconceptions.

  21. The average distance from Earth to the Sun is 1 AU. QUESTION • True • False

  22. A light-year is the distance light travels in one year. QUESTION • True • False

  23. A kilometer contains 1 million meters. QUESTION • True • False

  24. The Sun is a star in the Milky Way Galaxy. QUESTION • True • False

  25. The metric system is a decimal system. QUESTION • True • False

  26. 3.42 × 107 km is the same as 3.42 × 104 m. QUESTION • True • False

  27. The numbers 9.81 × 105 and 981,000 are equivalent. QUESTION • True • False

  28. A supercluster refers to a large group of stars within the Milky Way. QUESTION • True • False

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