Which statement describes stars from coolest to hottest?

red, orange, yellow, white, blue

Galaxies are composed of

billions of stars, dust and gas

Which statement best describes stars?

Celestial bodies made up of gas that give off light

Large planets that are composed mostly of gases

Objects that form in the outer parts of the solar system

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

The table compiles information about the distance of various stars from Earth, their apparent magnitude, and their absolute magnitude. Based on the information in the table, which of these statements is true?

Sirius looks the brightest from Earth, but Rigel has the greatest luminosity.

Sirius and Arcturus appear blue when observed from Earth.

When observed from Earth, Rigel and Betelgeuse appear the dimmest.

Aldebaran, Rigel, and Betelgeuse have lower luminosity than Sirius, Vega, and Arcturus do.

The diagram shows the relationship between absolute magnitude and temperature in stars. Which one of these conclusions can be drawn based on the graph?

Blue stars are generally hotter than red stars.

Absolute magnitude is not related to the temperature of a star.

Blue stars are farther from Earth than red stars

A blue star will appear brighter from Earth’s surface than a red star.

During a class project, Sofia made a scale drawing—similar to the illustration—showing the sizes of various stars. Then Sofia made a chart for four of the stars, using the names of the stars for column headings. She listed the stars in order from smallest to largest. (Note: Alshain is 3.2 not 32) Which of the following shows how the stars’ names appeared on Sofia’s chart?

Hamal, Delta Bootis, Alshain, sun

Xi Ursa Majoris, Polaris, Hamal, Delta Bootis

Gloria is at the observatory and is examining a newly discovered star through a powerful telescope. She wants to find out how bright the star actually is. What information does she need to calculate the absolute magnitude of a star?

Apparent magnitude and distance from Earth of the star.

Color and composition of the star

Color and distance from Earth of the star

How does the original mass of a star affect the length of the life cycle of the star?

Smaller stars live longer because they don't need as much fuel.

Larger stars live longer because they have more fuel to burn.

Medium size stars, or low mass stars, live longer because they have plenty of fuel and don't burn it all up.

Brown dwarfs because they burn at a cool temperature.

What is the relationship between wavelength, frequency and energy?

As wavelength decreases, frequency increases, and energy increases

As wavelength increases, frequency increases, but energy decreases

As wavelength increases, frequency decreases, but energy increases

As wavelength increases, frequency increases, but energy decreases

Which of the following is not true of a stellar black hole?

The stellar, or solar, wind causes the star to become a black hole

It is the leftover core of a massive star

Gravity is so strong that light cannot escape

Introduction to Stars

Authored by Charles Martinez

Other Sciences

6th - 8th Grade

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Introduction to Stars

Is the sun a star?

What is the closest star to the sun?

The color of the star tells us its

The hottest color star is

Our star is a

The only objects in our Universe that produces and emits its own light is

What do we use to classify the temperature, brightness, and size of stars?

Which measurements allows astronomers to compare the true brightness of stars?

Which statement describes stars from coolest to hottest?

Galaxies are composed of

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