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Grade 9 Space Exploration Part 2

Last updated about 7 years ago
22 questions
Note from the author:
Alberta, SD67, Space
1

Match the term and its meaning

  • adaptive optics
  • astronomical unit
  • diffraction grating
  • Doppler Effect
  • electromagnetic radiation
  • interferometry
  • light-year
  • parallax
  • radio astonomy
  • radio object
  • spectral lines
  • spectral analysis
  • spectroscope
  • spectroscopy
  • spectrum
  • triangulation
  • dark or bright lines observed in the spectra of stars
  • technology that adjusts the mirror of a telescope to cancel the effects of constant changes in Earth's atmosphere
  • the study of spectra produced when a beam of light passes through a prism
  • the distance from the Earth to the Sun
  • varying types of energy waves emitted by stars
  • the apparent shift in position of a nearby object when viewed from two different points
  • object in space that gives off large amounts of radio waves
  • phenomenon where wave changes occur when an object moves toward or away from an observer
  • using radio waves to learn about the composition of stars
  • method of estimating the distance to a object by creating an imaginary triangle
  • a device that produces a focused spectrum
  • bands of side-by-side colours produced when light refracts
  • device with many closely spaced slits through which light passes to produce a spectrum
  • the distance that light travels in one year
  • the study of spectra
  • technology that combines the images of several telescopes into one
1

A dark line spectrum is produced when the light from

1

When light passes through a diffraction grating,

1

Which of the following is the principle on which a police officer's radar gun establishes a car's speed?

1

In a spectrum, the light with the longest wavelengths are found

1

If the spectral lines for a particular star are red-shifted, you can infer that

1

From the information above, which elements appear to be present in the Sun?

Use the image below to answer the next two questions.
1

From the information above you can infer that

1

If Spectrum A was taken 10 years before Spectrum C, you can infer that

1

Spectra produced from radio waves tend to have poor resolution because

1

Martha wanted to use triangulation to estimate the distance from her to a tree in the distance. On her scale drawing she used a circle to represent where she was standing and a star to represent the tree. She then measured the angles formed by the ends of the baseline and the star. Finally, she drew a line from where she
Was standing to the tree. What serious error did Martha make?

1

The diameter of Earth's orbit is used as a baseline when determining the distance to a star because

1

The distant stars must be used as reference points because

1

It was first determined that radio waves were being emitted by stars when

1

Colour-coding of radio waves emitted by stars was done on the basis of

The Very Large Array is a Y-shaped array of 27 identical, 25 m dishes on railway tracks. Electric cables connect the dishes. Each of the three sections of the Y is about 20km long. The VLA has a resolution as so fine that the centimetre marks on a ruler could be seen five km away- if the ruler were broadcasting radio waves!
1

The technology described in the paragraph is

1

Which of the following statements is true of the image created by combining the information received by the 27 dishes?

1

Explain how the dark lines on absorption spectra help astronomers determine a stars composition.

1

Explain how a radar gun can be used to determine how fast a car is going.

1

Explain how astronomers use spectra to determine if a star is receding (moving away) or advancing (moving closer).

1

Why would the discovery of radio waves be important in determining the compostion of stars?

1

How might attaching radio telescopes to satellities launched into space help astronomers gain information about stars?