Lesson 29: Characteristics of Stars

Question 1

This is a ball of hot gases that emits light throughout the universe.

Answer 1

Star

Question 2

What type of star is the sun?

Answer 2

G type

Question 3

What are the seven types of stars?

Answer 3

O, B, A, F, G, K, and M

Question 4

One of the most useful tools in determining the characteristics of stars.

Answer 4

Hertzsprung-Russell Diagram (H-R Diagram)

Question 5

It was developed by two astronomers- Ejnar Hertzsprung and Henry Norris Russell.

Answer 5

H-R Diagram

Question 6

A Danish astronomer plotted the absolute magnitude of stars against their temperature.

Answer 6

Hertzsprung

Question 7

An American astronomer who used spectral colors against the absolute magnitude.

Answer 7

Russell

Question 8

These are the two characteristics that define the brightness of a star.

Answer 8

Luminosity and Magnitude

Question 9

This is the total energy that a star produces in one second.

Answer 9

Luminosity

Question 10

This is the star’s perceived brightness as seen on Earth.

Answer 10

Apparent Magnitude

Question 11

This is the system astronomers use to measure a star’s temperature.

Answer 11

Kelvin Scale

Question 12

These are very dense stars.

Answer 12

White Dwarfs

Question 13

These are made from the fusion of hydrogen atoms to form helium atoms in their cores.

Answer 13

Main Sequence Stars

Question 14

Former dwarfs that have cooled and expanded to a great size.

Answer 14

Giant Stars

Question 15

These start their life as main sequence dwarfs.

Answer 15

Supergiant Stars

Question 16

The life cycle of a star begins from a huge cloud of gas and dust called what?

Answer 16

Nebula

Question 17

This happens when some stars come to an end by collapsing into pieces in an explosion.

Answer 17

Supernova