Lesson 5.1 Review

Which of these statements describes a way scientists can study an object in space regardless of its distance from Earth?

• A spacecraft is sent to visit and analyze matter from the object.

• Scientists collect and analyze matter from the object.

• A telescope in orbit concentrates electromagnetic radiation from the object, and a spectrograph or other instrument is used to analyze the EM radiation.

• A telescope on the ground concentrates electromagnetic radiation from an object that gives off only x-rays.

Tags

NGSS.HS-PS4-3

Fill in the blanks...

As an ambulance approaches, the sound waves are ______, resulting in a _____ frequency wave. The opposite occurs as the ambulance recedes.

• expanded

• compressed

• higher

• lower

Tags

NGSS.HS-PS4-1

Spectrum "a" simulates a lab spectrum of hydrogen. Spectra b and c simulate two galaxies. Use the spectra to determine which of the following statements is correct.

• The absorption lines show that the two galaxies are composed of different elements.

• Spectrum b shows a galaxy that is moving away from the observer.

• Spectrum c shows a galaxy that is moving away from the observer.

• Spectrum b shows a smaller galaxy than

  spectrum c.

Tags

NGSS.HS-PS4-3

What can parallax be used to determine?

• the composition of stars based on the spectra of their starlight

• the distance to a star within 1000 light-years of Earth

• the temperature on the surface of a star within 1000 light-years of Earth

• the distance to extremely distant stars

Several of the world’s most powerful reflecting telescopes are located at the summit of Mauna Kea in Hawaii, nearly 14000 feet above sea level. What ranges of the EM spectrum are better observed at such a location than at sea level?

• visible light

• microwave

• x-ray

• infrared

Suppose you observe absorption spectra from three galaxies. All contain the same number of absorption lines. The lines have the same spacing in all three spectra. Lines in the first spectrum show blueshift, lines in the second match laboratory emission lines, and the lines in the third show redshift. Which of the following statements is correct?

• The differences in the line positions are due to differences between absorption spectra and emission spectra.

• The differences in the line positions show that the galaxies are composed of different elements.

• The blue-shifted lines of the first galaxy show that it is moving away from Earth.

• The red-shifted lines of the first galaxy show that it is moving away from Earth.

Tags

NGSS.HS-ESS1-2

True or false: as you move along the spectrum, left to right, the wavelengths decrease in size (get smaller)

• true
• false

Tags

NGSS.HS-PS4-1

Which section of the spectrum is the ONLY one we can see?

• X-rays
• Visible Light
• Gamma Rays
• Ultraviolet Rays

The distance between two crests or two troughs of a wave is called:

• frequency
• amplitud
• wavelength
• hertz

Tags

NGSS.HS-PS4-1

How much of the electromagnetic spectrum is visible?

• All of it
• None of it
• Most of it
• Only a small part