Which statement best describes M-type stars compared to O-type stars?

M-type stars are cooler and appear red.

M-type stars are hotter and appear blue.

M-type stars are the same temperature and appear white.

M-type stars are hotter and appear yellow.

Knowing a star’s mass from its position on the H-R diagram allows astronomers to predict which of the following?

How it will die (e.g., white dwarf, neutron star, or black hole)

Its orbital speed around the galaxy

Which pair correctly matches factor with effect for main-sequence stars?

Higher mass → more fusion → brighter and hotter

Higher mass → less fusion → dimmer

Lower mass → more fusion → bluer

Hydrogen composition → no fusion

According to the H-R diagram context, which two factors ultimately determine a star’s color, luminosity, temperature, and position on the main sequence?

Rotation rate and magnetic field strength

If the Sun were placed 10 parsecs from Earth, how would it appear?

Just barely visible, among the dimmest stars without a telescope

As one of the brightest stars in the sky

Invisible even with a telescope

Absolute brightness is defined as how bright a star would appear if it were placed at what standard distance from Earth?

10 parsecs (about 33 light years)

5 parsecs (about 16 light years)

100 parsecs (about 330 light years)

According to the H-R diagram information, what happens when large stars begin to fuse heavier elements?

They leave the main sequence to become giants or supergiants

They remain on the main sequence indefinitely

They immediately collapse into black holes

They cool into white dwarfs without expanding

What general trend do the axes of the H–R diagram reveal about star temperature and brightness?

Temperature and brightness are unrelated

Cooler stars are always brighter

Why does the Sun have the highest apparent brightness among stars in our sky?

It has no planets to dim its light

It is the most luminous star in the universe

Its color makes it appear brighter

On an H–R diagram, how does the surface temperature change along the horizontal axis from left to right?

It decreases from left to right.

It increases from left to right.

It increases to the middle, then decreases.

What is the best description of “star birth” in this context?

The ignition of nuclear fusion in the protostar’s core

The formation of a flat disk from the cloud

The initial collision of particles in the gas cloud

The moment the protostar becomes visible in optical light

According to the description, what will eventually happen to the Sun?

It will leave the main sequence and ultimately become a white dwarf

It will become a supergiant and then a black hole

It will remain on the main sequence forever

It will cool directly into a brown dwarf

Which statement is most accurate about the composition and role of nebulae in the life of stars?

Nebulae are clouds of gas and dust that are the birthplaces of stars

Nebulae are empty regions that separate galaxies

Nebulae are dense planetary cores where fusion already occurs

Nebulae are rings of ice that orbit young stars

Which term is also used for a star’s absolute brightness?

Luminosity or absolute magnitude

What is stated to occur if a star is not massive enough to fuse heavier elements?

It becomes part of the main sequence

Why does greater stellar mass lead to higher luminosity?

It causes more nuclear fusion in the core

Which sequence best describes the early steps of star birth in this section?

Particles collide → cloud spins and flattens into a disk → disk attracts more gas and dust → hot, dense core forms

Cloud flattens due to radiation → planets form → star ignites

Gas is expelled → disk slows down → core cools

Protostar forms first, then disk spins, then particles collide

Select the correct sequence that describes star formation according to the material.

Nebula → Disk → Protostar → Nuclear fusion → Star

Nebula → Nuclear fusion → Protostar → Star

Protostar → Nebula → Nuclear fusion → Star

Gas and dust → Main-sequence star → Nebula → Disk

Which statement best describes the core of a star?

An extremely hot and dense center where nuclear fusion occurs

A region of moderate temperature that transports energy by convection

A cool, diffuse outer shell where light escapes

A solid metallic center that reflects radiation

In the convection zone, what happens to hot plasma compared to cooler plasma?

Hot plasma rises while cooler plasma sinks

Hot plasma sinks while cooler plasma rises

Both hot and cool plasma remain stationary

Based on the diagram, which sequence correctly orders the layers from the core outward through the energy-transfer regions?

Core → Radiative zone → Convection zone

Convection zone → Core → Radiative zone

Radiative zone → Core → Convection zone

Core → Convection zone → Radiative zone

Which statement best distinguishes the photosphere from the corona?

The photosphere is the visible surface; the corona is the outermost plasma extending far into space.

The photosphere releases solar wind, while the corona traps light.

The corona is cooler and denser than the photosphere.

Solar wind is best described in this material as which of the following?

A stream of charged particles released by the corona

A convection current in the radiative zone

A stream of photons escaping from the photosphere

A flow of molten plasma in the core

Which sequence correctly orders the listed layers from innermost to outermost based on the diagram and text?

Core → Radiative zone → Convection zone → Photosphere → Corona

Photosphere → Core → Radiative zone → Convection zone → Corona

Corona → Photosphere → Convection zone → Radiative zone → Core

Core → Convection zone → Radiative zone → Photosphere → Corona

Which comparison correctly distinguishes sunspots from solar flares?

Sunspots are temporary cooler dark patches; solar flares are sudden intense energy bursts

Both are permanent features; sunspots are brighter

Solar flares are dark patches on the photosphere; sunspots are bursts of energy

Sunspots are magnetic energy releases; solar flares are cooler regions

Which Earth-based systems are specifically mentioned as being disrupted by solar flares?

Satellite communications and power grids

Ocean currents and weather patterns

Plate tectonics and earthquakes

Agricultural cycles and plant growth

Which description best matches the visual of a solar prominence?

A massive loop arching away from the Sun's surface

A ring surrounding the entire Sun

A bright point of light at the Sun's center

HR Diagram, Life and Death of Stars Test

11th Grade

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70 Qs

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HR Diagram, Life and Death of Stars Test

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11th Grade

•

Practice Problem

•

Medium

•

NGSS

HS-ESS1-1, HS-ESS1-3, HS-PS1-8

Standards-aligned

Simone Huey

Used 3+ times

FREE Resource

70 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the context of star formation, what is a nebula?

A small asteroid belt between planets

The outer layer of an old star

A type of galaxy with spiral arms

A vast cloud of gas and dust in space

What materials primarily make up the regions where stars form?

Plasma and antimatter

Liquid metals

Solid rock and ice

Gas and dust

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which sequence best represents the initial stages of star formation as described?

Gas and dust in a nebula contract due to gravity, initiating star formation

Nebulae heat up due to nuclear fusion, then gas and dust appear

Stars explode and immediately become nebulae without any contraction

Gas and dust form a planet, then a star forms from the planet

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What two stellar properties are plotted against each other on a Hertzsprung–Russell (H–R) diagram?

Distance versus apparent magnitude

Luminosity (brightness) versus surface temperature

Mass versus age

Radius versus composition

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does spectroscopy allow astronomers to determine about a star?

Its age to the nearest year

Which elements are in the star

Its exact mass

Its distance from Earth

Which statement best defines apparent brightness?

How bright a star appears from Earth, also called its apparent magnitude

How bright a star would appear if all stars were the same size

The brightness of a star when observed through a telescope only

The total energy a star emits each second regardless of distance

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

According to spectral classification, which stars are the hottest and what color do they appear?

G-type; yellow

O-type; blue

K-type; orange

M-type; red

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HR Diagram, Life and Death of Stars Test

70 questions

In the context of star formation, what is a nebula?

What materials primarily make up the regions where stars form?

Which sequence best represents the initial stages of star formation as described?

What two stellar properties are plotted against each other on a Hertzsprung–Russell (H–R) diagram?

What does spectroscopy allow astronomers to determine about a star?

Which statement best defines apparent brightness?

According to spectral classification, which stars are the hottest and what color do they appear?

Which statement best describes M-type stars compared to O-type stars?

What is the main force that causes particles in a nebula to contract during the early stages of star formation?

Knowing a star’s mass from its position on the H-R diagram allows astronomers to predict which of the following?

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