Question 1

The expansion of the Universe is slowing down, and it will eventually collapse on itself.

Accepted Answer

A) True 
 B)False

Question 2

In the ____________________ zone of a star, hot gas rises, cools, and then sinks in huge, circulating cells.

Accepted Answer

The answer of In the ____________________ zone of a star,...

Question 3

Why does fusion cease in a star once iron forms?

Accepted Answer

A)  Iron reacts with hydrogen, preventing any more hydrogen fusion. 
B)  Iron is too dense and the star collapses inward. 
C)  Iron fusion absorbs energy rather than releasing energy. 
D)  Iron fusion releases too much energy, blowing the star apart. 
A)  Iron reacts with hydrogen, preventing any more hydrogen fusion. 
B)  Iron is too dense and the star collapses inward. 
C)  Iron fusion absorbs energy rather than releasing energy. 
D)  Iron fusion releases too much energy, blowing the star apart.

Question 4

A graph that plots absolute stellar luminosity versus temperature is called a(n) ____________________ diagram.

Accepted Answer

Hertzsprun

Question 5

How and when did an initially uniform, homogeneous Universe concentrate into stars, galaxies, and clusters?

Accepted Answer

According to one hypothesis, the origina

The expansion of the Universe is slowing down, and it will eventually collapse on itself.

In the ____________________ zone of a star, hot gas rises, cools, and then sinks in huge, circulating cells.

Why does fusion cease in a star once iron forms?

A graph that plots absolute stellar luminosity versus temperature is called a(n) ____________________ diagram.

How and when did an initially uniform, homogeneous Universe concentrate into stars, galaxies, and clusters?

Earth Systems

Minerals

Rocks

Geologic Time: a Story in the Rocks

Geologic Resources

The Active Earth: Plate Tectonics

Earthquakes and the Earths Structure

Volcanoes and Plutons

Mountains

Weathering, Soil, and Erosion

Fresh Water: Streams, Lakes, Ground Water, and Wetlands

Water Resources

Glaciers and Ice Ages

Deserts and Wind

Ocean Basins

Oceans and Coastlines

The Atmosphere

Energy Balance in the Atmosphere

Moisture, Clouds, and Weather

Climate

Climate Change

Motions in the Heavens

Planets and Their Moons

Filters

Exam 24: Stars, Space, and Galaxies

The expansion of the Universe is slowing down, and it will eventually collapse on itself.

In the ____________________ zone of a star, hot gas rises, cools, and then sinks in huge, circulating cells.

Why does fusion cease in a star once iron forms?

A graph that plots absolute stellar luminosity versus temperature is called a(n) ____________________ diagram.

How and when did an initially uniform, homogeneous Universe concentrate into stars, galaxies, and clusters?

Earth Systems

Minerals

Rocks

Geologic Time: a Story in the Rocks

Geologic Resources

The Active Earth: Plate Tectonics

Earthquakes and the Earths Structure

Volcanoes and Plutons

Mountains

Weathering, Soil, and Erosion

Fresh Water: Streams, Lakes, Ground Water, and Wetlands

Water Resources

Glaciers and Ice Ages

Deserts and Wind

Ocean Basins

Oceans and Coastlines

The Atmosphere

Energy Balance in the Atmosphere

Moisture, Clouds, and Weather

Climate

Climate Change

Motions in the Heavens

Planets and Their Moons

Filters