Star Properties/The Sun

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

• False
• True

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

All stars are formed from a  __________?

• giant
• black hole
• white dwarf
• nebula

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

Very hot stars are what color? 

• Blue
• Yellow
• Red
• Orange

What is the color of the coolest stars?

• blue
• yellow
• red
• orange

Put the stars in order from coolest to hottest.

• Blue, White, Yellow, Orange, Red
• Red, Orange, Yellow, White, Blue
• Red, Orange, Yellow, Blue, White
• Red, Yellow, Orange, White, Blue

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

_______________ are temporary phenomena on the photosphere of the Sun that appear as dark spots compared to surrounding regions. They are caused by intense magnetic activity.

• sunspots

• prominence

• solar flare

• photosphere

Star light, star bright: how bright a star appears to us on Earth depends MAINLY on

• the age of the star.

• your position on Earth.

• the composition of the star.

• the star's distance from Earth.

Luminosity is the amount of energy emitted by a star each second. Stars radiate light over a broad range of frequencies in the electromagnetic spectrum, from the low energy radio waves to high energy gamma rays. The luminosity of a star depends on two factors:

• age and surface area.

• surface area and temperature.

• gravity and distance from Earth.

• distance from Earth and temperature.

The ________________ is the region around the Sun, extending more than one million kilometers from its surface, where the temperature can reach two million degrees. This is where the solar winds originate.

• corona

• photosphere

• prominences

• sunspots