31.1 - Observing the Universe(20pts.)

A ​ (a)   is the distance ​ (b)   travels in one ​ (c)   . This is the standard ​unit of measurement scientists use for measuring distances between ​ (d)   and galaxies.

• light-year

• light

• year

• stars

• Astronomical Unit

Answer explanation

The term 'light-year' is the distance light travels in one year, used by scientists to measure distances between stars and galaxies.

Tags

HS-ESS1-2

Organize the Telescopes by type or description.

Groups:

(a) Reflecting

,

(b) Refracting

• 
• Uses mirrors to collect and focus light.

• 
• Uses lenses to collect and focus light.

Tags

HS-ESS1-2

Which of the following statements best explain the benefits of using radio telescopes?

Select all that apply.

• Radio telescopes don't have to be launched into space.

• Radio waves can be detected 24 hours per day.

• Radio telescopes are less expensive than optical telescopes.

• Radio waves can be detected when its cloudy.

Answer explanation

Radio telescopes don't need to be launched into space, can detect radio waves 24 hours a day, and can operate even when it's cloudy, providing cost-effective and continuous observation capabilities.

Tags

HS-ESS1-2

Which of the following statements best explain the benefits of using space telescopes?

Select all that apply.

• Space telescopes don't have to be launched into space.

• Space telescopes are not affected by weather.

• Space telescopes can obtain the clearest, most detailed images of space.

• Space telescopes have discovered alien life.

Answer explanation

Space telescopes are not affected by weather and can obtain the clearest, most detailed images of space, making them advantageous for astronomical observations.

Tags

HS-ESS1-2

Which magnifies the image in a telescope?

• focal length

• eyepiece

• objective

• focus

Answer explanation

The eyepiece magnifies the image in a telescope by focusing the light rays and enlarging the image for the viewer.

Tags

HS-ESS1-2

Use the equation M_p = f_o/f_e to determine the magnifying power of a telescope in which the focal lengths of the objective lens and the eyepiece lens are 1500 mm and 9 mm, respectively.

[Number only, no units]

Mathematical Equivalence

ON

Tap the [2 spots] above the spectra lines that PROVE the Sun has Helium.

Tags

NGSS.HS-ESS1-2

The dark lines that show astronomers what elements are present in Stars are called ​ (a)   .

• Star-Spectra

• Light-Year

• Astronomical Unit

• Electromagnetic Spectrum

Answer explanation

The dark lines that show astronomers what elements are present in Stars are called Star-Spectra.

Tags

HS-ESS1-2

What are groups of stars as seen from Earth called?

{Often names come from ancient cultures or stories}

• Constellations

• Zodiac

• Light-Years

• Galaxies

Answer explanation

Groups of stars as seen from Earth are called constellations. These names often come from ancient cultures or stories, making them significant in various traditions.

Tags

HS-ESS1-2

True or False?

Radio telescopes observe visible light.

• True - Radio telescopes detect light.

• False - Radio telescopes detect Star Spectra.

• False - Radio telescopes detect radio waves.

• False - Radio telescopes detect gamma rays.

Answer explanation

Radio telescopes detect radio waves, not visible light. They are designed to observe and study celestial objects emitting radio frequencies.

Tags

HS-ESS1-2