Nebula Theory

Question 1

Nebula means?

Answer 1

Cloud. Cloud of interstellar dust and gas!

Question 2

Stars originate from interstellar dust and gas.

Answer 2

TRUE

Question 3

The nebular theory explains the origin of the?

Answer 3

SOLAR SYSTEM

Question 4

What are the three major steps on how the SS was formed thru the NT?

Answer 4

1. Cloud collapse
2. Formation of protoplanetary disk
3. Growth of planets

Question 5

CLOUD COLLAPSE:

The origin of the planets and sun in the solar system is a huge cloud of molecular gas and dust.

Answer 5

TRUE

Question 6

CLOUD COLLAPSE:

What are the two possible causes of the collapsing of cloud?

Answer 6

1. Shockwave of the supernova
2. Effect of the passing star

Question 7

CLOUD COLLAPSE:

The cloud collapsed at the CENTER, due to ___. The gas pressure becomes insufficient to support the mass of the cloud.

Answer 7

GRAVITY

Question 8

CLOUD COLLAPSE:

The collapsing of the cloud made it spin FASTER

Answer 8

TRUE

Question 9

CLOUD COLLAPSE:

What did the spinning and shrinking cloud form?

Answer 9

It FLATTENED TO A DISK CLOUD with CENTRAL BULGE.

Question 10

CLOUD COLLAPSE:

What direction did the cloud spin?

Answer 10

Counterclockwise

Question 11

CLOUD COLLAPSE:

The radius of the cloud became SMALLER as it spun faster.

Answer 11

TRUE

Question 12

CLOUD COLLAPSE:
Rotational velocity is inversely proportional to radius.

Answer 12

TRUE.
The longer arms/bigger size, the slower it will spin

Question 13

CLOUD COLLAPSE:

The flattened disk is our?

Answer 13

PROTOSUN!!!!!!!!

Question 14

DISK:

The formation of terrestrial (hot/warm) planets is near the sun because?

Answer 14

The presence of metals and silicates are near the sun.
This makes the terrestrial planets the planets with metal and silicates.

Question 15

DISK:

Jovian planets were formed far from the sun because?

Answer 15

The temperature is cooler enough for the gases to condense,
forming these massive, but low-density planets.

Question 16

DISK:

JOVIAN- LOW DENSITY PLANETS
TERRESTRIAL- HIGH DENSITY PLANETS

Answer 16

TRUE

Question 17

DISK:
Why are terrestrial planets small

Answer 17

Because there are limited resources of metal and silicates present near the sun.

Question 18

DISK:
Ices and gases CANNOT condense NEAR THE SUN.

Answer 18

TRUE

Question 19

DISK:
The metals and silicates in the outer part of the disk CONDENSE.

Answer 19

TRUE

Question 20

GROWTH:
Dust and grains surrounding the sun eventually formed clumps

Answer 20

TRUE

Question 21

GROWTH
The clumps then accreted forming?

Answer 21

PLANETESIMALS

Question 22

GROWTH:

What are planetesimals?

Answer 22

Small celestial bodies that once COLLIDE together and it tend to FUSE to form the planets of the solar system.

Question 23

Who are the proponents of the Nebular Theory?

Answer 23

1. Immanuel Kant
2. Emmanuel Swedenbord
3. Pierre-Simon Laplace

Question 24

What are the drawbacks of the Nebular Theory? (3)

Answer 24

1. It assumes that dust particles will be
   attached to each other forming a planet, when Saturn cannot do because this planet repels the particles.
2. It does not follow the law of angular momentum.
3. This theory excluded Venus and Uranus. These planets spin clockwise, unlike what the NT stated that the disk rotates counterclockwisely.