Earth Science Chapter 24 Test

Front

What is an absorption spectrum?

Back

An absorption spectrum is produced when visible light passes through a relatively cool gas under low pressure, resulting in specific wavelengths of light being absorbed.

Front

What is the primary source of information about the universe?

Back

The vast majority of our information about the universe is obtained from the study of the light emitted from stars and other bodies in space.

Front

What do larger Doppler shifts indicate?

Back

Larger Doppler shifts indicate higher speeds, while smaller Doppler shifts indicate slower speeds.

Front

What is a key advantage of space telescopes over Earth-based telescopes?

Back

Space telescopes avoid atmospheric distortion, allowing for clearer observations of celestial objects.

Front

Why are observatories often built on mountaintops?

Back

Observatories are built on mountaintops to reduce the effects of atmospheric distortion and to avoid light pollution.

Front

Define Doppler effect in the context of astronomy.

Back

The Doppler effect refers to the change in frequency or wavelength of light from an object moving relative to an observer, which can indicate the object's speed and direction.

Front

What is the significance of light pollution for astronomers?

Back

Light pollution interferes with the ability to observe celestial objects clearly, making it essential for observatories to be located in dark areas.

Front

Explain the term 'redshift' in astronomy.

Back

Redshift occurs when light from an object is stretched to longer wavelengths as it moves away from the observer, indicating that the object is receding.

Front

What is the role of spectroscopy in astronomy?

Back

Spectroscopy is used to analyze the light from stars and other celestial bodies to determine their composition, temperature, density, and motion.

Front

How does the atmosphere affect astronomical observations?

Back

The atmosphere can distort and absorb light, leading to less clear images and making it difficult to observe distant celestial objects.