Physical Properties of Stars

Physical Properties of Stars

By Florence Allbaugh

Multiple Choice

Which statement best describes stars?

• large planets that are composed mostly of gases

• celestial bodies made up of gas that give off light

• faint dots of light that can be seen from Earth’s surface

• objects that form in the outer parts of the solar system

Multiple Choice

One physical property of a star is apparent magnitude. Which of the following is used in determining the apparent magnitude of a star?

• the constellation the star is in

• the distance the star is from Earth

• the number of times the star rotates

• the number of prominences the star makes

Multiple Choice

The chart below displays the names of different stars and their colors. Which of the groups below best orders the stars from hottest to coolest?

• A. Antares, Spica, Sun, Aldebaran

• B. Sun, Spica, Antares, Aldebaran

• C. Spica, Sun, Aldebaran, Antares

• D. Antares, Aldebaran, Sun, Spica

Multiple Choice

One physical property of a star is absolute brightness. Which of the following is used in determining the absolute brightness of a star?

• how bright the star actually is

• how bright the star appears to be from the Earth

• the number of prominences the star makes

• the direction the star rotates

Multiple Choice

Why do other stars appear so much smaller than the sun?

• They are much smaller
• They are so far away
• They are not as bright
• They are dwarf stars

Multiple Choice

What is the name of the gas/dust clouds that form stars?

• Nebulas
• Protostars 
• Supernova
• Neutron Star

Multiple Choice

Stars that are very bright, large & burn at the highest temperature

• Blue Giant stars

• Red Giant

• White dwarves

• Proton stars

Multiple Choice

Which star is the coldest?

• Yellow Star

• Red Star

• Orange Star

• Blue Star

Multiple Choice

Which star has the lowest temperature?

• A
• B
• C
• D

Multiple Choice

As you move from the bottom to the top of the H R diagram the __________ changes.

• Temperature
• Luminosity or Brightness

Multiple Choice

Which star is considered a main sequence star?

• Vega

• Betelgeuse

• Pollux

• Van Maanan's Star

Multiple Choice

What is the Hertzsprung-Russel Diagram?

• A map which tells the approximate location of stars in the Milky Way galaxy and their distance from Earth.

• A table that alphabetically lists stars by name and includes dates of when the star was first charted.

• A chart which organizes stars into categories based on the amount of Hydrogen they burn.

• A graph used to classify stars according to their luminosity, color, temperature, and stage.

Multiple Choice

Which category is our Sun located in?

• White Dwarfs

• Supergiants

• Main Sequence

• Giants

Multiple Choice

Which statement best describes stars?

• large planets that are composed mostly of gases

• celestial bodies made up of gas that give off light

• faint dots of light that can be seen from Earth’s surface

• objects that form in the outer parts of the solar system

Multiple Choice

The energy from the sun is created by a process called:

• nuclear fission
• nuclear fusion
• nuclear reaction
• nuclear core

Multiple Choice

____________are areas of gas on the sun that are cooler than the gas around them.

• Solar Wind

• Solar Flares

• Sunspots

• Core

Multiple Choice

Energy is created in the core when two _____________ atoms join together to form a ______________ atom.

• helium, hydrogen
• carbon, hydrogen
• nitrogen, helium
• hydrogen, helium

Multiple Choice

When we look at the sun, what layer are we viewing?

• photosphere
• chromosphere
• corona
• convection zone

Multiple Choice

What layer can be seen here?

• chromosphere
• corona
• photosphere
• core

Multiple Choice

What is the sun mostly made up of

• Helium
• Core
• Carbon
• Hydrogen

Multiple Choice

a brief burst of energy from the sun’s photosphere

• corona
• solar flare
• solar wind
• photosphere

Multiple Choice

What type of reaction occurs at the core of the Sun?

• Nuclear fusion

• Electrolysis

• Acid Base Reaction

• Combustion

Multiple Choice

The Sun is NOT a star.

• True

• False

Multiple Select

Which of the following correctly describes the rotation of the Sun?

• All parts of the Sun rotate together.

• The Sun rotates faster at its equator than at its pole.

• The Sun rotates slower at its equator than at its pole.

• The Sun does not rotate at all.

Multiple Choice

Felix examined several photos of stars. To compare their temperatures, he looked at the colors of the stars. He organized the photos in order from coolest to hottest. Which of these answers shows the correct order?

• red, yellow, white, blue

• white, blue, yellow, red

• yellow, white, blue, red

• blue, yellow, white, red

Multiple Choice

Absolute magnitude is defined as…

• mass of a star

• color of a star

• brightness of a star, as it appears from Earth

• brightness of a star independent from the distance of Earth

Multiple Choice

The brightness of a star as seen from earth is defined as:

• Apparent Brightness
• Absolute Brightness
• Brightness
• Candid Brightness

Multiple Choice

Stars are made of mostly which two gases?

• Hydrogen and Helium

• Hydrogen and Oxygen

• Hydrogen and Nitrogen

• Hydrogen and Carbon

Multiple Choice

Why do other stars appear so much smaller than the sun?

• They are much smaller
• They are so far away
• They are not as bright
• They are dwarf stars

Multiple Choice

Which statement best describes stars?

• large planets that are composed mostly of gases

• celestial bodies made up of gas that give off light

• faint dots of light that can be seen from Earth’s surface

• objects that form in the outer parts of the solar system

Multiple Choice

One physical property of a star is apparent magnitude. Which of the following is used in determining the apparent magnitude of a star?

• A. the constellation the star is in

• B. the distance the star is from Earth

• C. the number of times the star rotates

• D. the number of prominences the star makes

Multiple Choice

One physical property of a star is absolute brightness. Which of the following is used in determining the absolute brightness of a star?

• how bright the star actually is

• how bright the star appears to be from the Earth

• the number of prominences the star makes

• the direction the star rotates

Multiple Choice

Billions of stars are held together in groups called __________.

• galaxies

• solar systems

• planets

• comets

Multiple Choice

What color of star is the coolest?

• Red
• Yellow
• Blue
• White

Multiple Choice

Apparent (magnitude) brightness is affected by a star's distance from Earth.

• False
• True

Multiple Choice

Which property of a star is the brightness of a star at a standard distance?

• Apparent (magnitude) brightness
• Absolute (magnitude) brightness
• Luminosity
• Size of the star

Multiple Choice

Star Z and W both have the same luminosity of 100 lux, if Star Z is 10 ly closer to Earth which star has the highest apparent magnitude?

• Star W
• Star Z
• Both Star Z and W

Multiple Choice

The brightness of a star as seen from Earth is its 

• apparent brightness.
• absolute brightness.
• parallax.
• reflective brightness.

Multiple Choice

A very bright star can seem to be dimmer because it is 

• further away
• cooler in temperature
• very close
• batteries are dying

Multiple Choice

What is an explosion on the sun that gives out huge amounts of energy?

• Sun Spot
• Solar Flare
• Sun Ray
• Sun Gases

Multiple Choice

What is the sun made out of?

• fire and lava
• gases
• magma
• flames

Multiple Choice

The sun appears to move across the sky due to :

• the Sun's rotation

• the Sun orbits the stars

• the stars are orbiting around the Sun

• the Earth's rotation