Properties of the Stars

During science class, Ava and Justin were discussing the speed of the Sun’s rotation, and debating over which model would best illustrate the different speeds in each zone. As they were reviewing the different models, they noticed that the more arrow heads in a region showed a greater speed. Which model below best represents how the Sun's rotational pattern?

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Destiny was looking at different stars in the night sky with her telescope and noticed that some stars were red while other stars were blue. What answer choice below best describes why a star would appear to have a different color?

• Blue stars are hotter than red stars.

• Red stars are hotter than blue stars.

• Blue stars are closer to Earth than red stars.

• Red stars are closer to Earth than blue stars.

Tags

NGSS.HS-PS4-1

Aaleyah learned that astronomers use different properties, such as their brightness, to classify stars. Which other property can scientists use to classify stars?

• The star’s rotation to calculate the distance from Earth.

• The color to classify the absolute brightness of the star.

• The size of the star to categorize them in the main sequence.

• The apparent magnitude is used to classify the energy of the star.

Look at the diagram. Which of the following statements accurately describes one of the stars in the HR diagram?

• Star A is the brightest star.

• Star B is a red star.

• Star C is the dimmest star.

• Star D is the hottest star.

Use the table to answer the question. Which statement about the absolute brightness of Vega and Arcturus is correct?

• Arcturus has less absolute brightness than Vega.

• Arcturus has a greater absolute brightness than Vega.

• Vega has a greater absolute brightness than Arcturus.

• Vega and Arcturus have the same absolute brightness.

Look at the diagram. How would scientists describe the properties of Star X compared to the Sun?

• Star X is dimmer and hotter than the Sun.

• Star X is brighter and hotter than the Sun.

• Star X is brighter and cooler than the Sun.

• Star X is dimmer and cooler than the Sun.

Tags

NGSS.HS-ESS1-3

Look at the diagram. Which solar property is represented at number nine?

• core

• flare

• sunspot

• prominence

Which of the following options correctly lists the Sun's layers from inner layer to outer layer?

• core, convection zone, photosphere, radiative zone, corona, chromosphere

• core, radiative zone, convection zone, photosphere, chromosphere, corona

• corona, radiative zone, photosphere, chromosphere, convection zone, core

• corona, convection zone, radiative zone, photosphere, chromosphere, corona

Satellites are used mainly to gather light from cosmic objects. The Hubble telescope is shown in the drawing below. As it travels, Hubble's mirror captures light and directs it into its several science instruments. How is this technology advancing our understanding of the universe?

• It is capable of counting individual atoms in a substance in order for scientists to study them.

• It is capable of sending audio communication to other planets in our solar system for them to respond

• It has already sent pictures that show other planetary systems in the universe in order for scientists to study them.

• It is capable of sending clear, distinct images of distant objects, like other galaxies in order for scientists to study them.

When studying celestial bodies, scientists examine satellite images of the same object made with different waves of the electromagnetic spectrum. How does using different types of electromagnetic waves provide a more complete understanding of the celestial bodies?

• EM waves have the same energy which provides unique information.

• EM waves travel at different speeds which provide unique information.

• EM waves travel the same distance which provides unique information.

• EM waves have different wavelengths which provide unique information

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-4