Unit 7

Question 1

_____________ occurs in really hot stars.

Answer 1

triple-alpha process

Question 2

In which luminosity class are main-sequence stars chosen?

Answer 2

Class V

Question 3

An object being compressed to infinite density to almost no volume is a point called ________.

Answer 3

singularity

Question 4

Helium-4 is created after the ___________.

Answer 4

hydrogen-helium process

Question 5

Which type of star is the sun since it is above-average size?

Answer 5

G2

Question 6

_____ marks the end of a blue star’s life.

Answer 6

iron

Question 7

_____ spin rapidly because they are governed by the spin rate of their original star because of how small it has become.

Answer 7

Pulsars

Question 8

The spectroscope was invented by _______________.

Answer 8

Joseph von Fraunhofer

Question 9

_____________ plotted the absolute magnitude of stars against their spectral classes.

Answer 9

Henry Russell

Question 10

plotted the absolute magnitude of individual stars within clusters against their colors

Answer 10

Enjar Herzsprung

Question 11

When the absolute magnitude of stars against their __________, that chart is called the ______________.

Answer 11

temperatures, H-R Diagram

Question 12

________ begins and ends with the same element.

Answer 12

carbon-cycle

Question 13

The measurement of the total energy output of a star is called
__________.

Answer 13

absolute magnitude

Question 14

Fluids at rest are called _____________.

Answer 14

hydrostatic equilibrium

Question 15

Because their electrons cannot get any closer, __________ do not get any smaller.

Answer 15

white dwarfs

Question 16

___________ indicated by adding a Roman numeral to the letter and number that designates a star’s class

Answer 16

luminosity

Question 17

Everything we know about stars is because of the _____ they emit.

Answer 17

light

Question 18

Which term refers to how bright a star looks in the sky?

Answer 18

apparent magnitude

Question 19

_____ rules what characteristics a star shows through all stages of its activity.

Answer 19

Mass

Question 20

What star suddenly flares up, then grows dim over time?

Answer 20

nova

Question 21

In the triple-alpha process, when helium begins to fuse _______ it is called a ____________.

Answer 21

carbon, helium flash

Question 22

A star that explodes, neutron stars and black holes are forms of ________________.

Answer 22

degenerate matter

Question 23

To keep helium from collecting within their cores, ______ used convection.

Answer 23

red dwarfs

Question 24

A ______ leaves the main sequence when it stops fusing _______ into helium in its core.

Answer 24

star, hydrogen

Question 25

Stars toward the lower right of the _______________ fuse elements at a slower rate because they have less internal ______________.

Answer 25

main sequence, nuclear activity