Chapter 30 Section 2

Question 1

What is a nebula?

Answer 1

Stars that form a large cloud of gas, ice, and dust.

Question 2

What is a main sequence?

Answer 2

Stars in a broad band from the hot, bright stars to the cool, dim stars. All the other stars fall into three areas on the H-R diagram.

Question 3

What is are Sun going to become in 5 billion years?

Answer 3

Giant star

Question 4

What forms as the core of a giant star no longer supports fusion and the star’s outer layers escape into space, leaving a hot and dense core?

Answer 4

White dwarf

Question 5

What is an area in space that is so dense that nothing can escape its pull of gravity?

Answer 5

Black hole

Question 6

What is the layer of the Sun that emits light into space into space?

Answer 6

Photosphere

Question 7

What is the result of a supergiant collapsing and releasing a huge amount of energy and very fast-moving neutrons?

Answer 7

Supernovas

Question 8

What are neutron stars?

Answer 8

• When star explodes and leaves behind a ball of neutrons.
• Stars that are 8 times more massive that our Sun evolve differently.
• Their core temperatures are hot enough to fuse heavier elements.

Question 9

What are dark, cool areas in the photosphere where the Sun’s magnetic field has weakened?

Answer 9

Sunspots

Question 10

`What does H-R Diagram mean?

Answer 10

Hertzsprung-Russell Diagram

Question 11

What the layers of the Sun?

Answer 11

• The core
• The radiation zone
• The convection zone

Question 12

What is the atmosphere above photosphere composed of?

Answer 12

Chromosphere and corona

Question 13

Are sunspots permanent on the Sun?

Answer 13

No, they are not permanent features