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5 Written questions

5 Matching questions

  1. According to modern atomic theory, light emitted by atoms originates from
  2. Which of the following is a critical component of the scientific method?
  3. Are the constellations seasonal?
  4. What is the half-life of a sample of matter containing radioactive element?
  5. In the system of celestial coordinates that matches latitude and longitude on the Earth, which in the coordinate that is equivalent to latitude?
  1. a declination
  2. b time needed for half the radioactive atoms in the sample to decay.
  3. c testing of prediction from a scientific theory or theoretical model.
  4. d transitions of electrons between electron levels of the same atom.
  5. e Yes, On a summer night many of the constellation you can see are different from the constellations you can see on a winter night. But there are some constellations you can see all year long.

5 Multiple choice questions

  1. visible light, UV radiation, X rays, gamma rays
  2. Solar spectra show absorption in spectral lines that are characteristic of iron and are unique to it.
  3. are 88 in number and cover the entire sky.
  4. rotation of Earth on it axis.
  5. number of protons in the atomic nucleus and hence its positive charge.

5 True/False questions

  1. The declination of a star in the sky is defined as the angle between theabsorbs all radiation that falls on it.


  2. The term retrograde motion from a planet refers to theSun-centered, with the planets moving in perfect circles around the Sun.


  3. Kepler's first law states that a planet moves around the Sun in a(n)elliptical orbit, with the Sun at one focus.


  4. Why was adaptive optics developed?to compensate for image distortion caused by the Earth's atmosphere.


  5. One light-year is thebending of light as it enters a dense but transparent material at an angle to the perpendicular to the surface of the material.