Grade 9 Space Exploration Part 2

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

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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

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

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

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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

Grade 9 Space Exploration Part 2

Match the term and its meaning

A dark line spectrum is produced when the light from

When light passes through a diffraction grating,

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

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

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

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

From the information above you can infer that

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

Spectra produced from radio waves tend to have poor resolution because

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

The distant stars must be used as reference points because

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

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

The technology described in the paragraph is

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

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

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

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

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

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

Match the term and its meaning

A dark line spectrum is produced when the light from

When light passes through a diffraction grating,

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

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

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

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

From the information above you can infer that

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

Spectra produced from radio waves tend to have poor resolution because

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

The distant stars must be used as reference points because

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

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

The technology described in the paragraph is

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

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

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

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

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

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