Lesson 1.3

Question 1

the solar system originated from
a nebula.

It is the widely accepted view about the formation of the solar
system some 4.5 billion years ago.

Answer 1

Nebular Theory

Question 2

is defined by NASA as
giant cloud of gas and dust in space.

Answer 2

nebula

Question 3

This interstellar cloud of dust
contains hydrogen, helium and other
ionized gases.

Answer 3

nebula

Question 4

The formation of the solar
system from a nebula occurs in
three major steps:

Answer 4

cloud collapse
formation of protoplanetary disk
growth of planets

Question 5

Hypothetically, a shockwave from a supernova or the effect of a
passing star may cause a _ _.

Answer 5

cloud collapse

Question 6

The collapse at the center of the cloud due to gravity occurs when
gas pressure becomes insufficient to support the mass of the cloud.

Answer 6

cloud collapse

Question 7

The collapsed cloud of interstellar gas and dust results to a smaller
radius which means it will spin faster.

Answer 7

slowly spinning interstellar cloud

grabity makes cloud shrink, as it shrinks it spins faster and flattens into a disk with central bulge

rotation retards collpase in this direction

Question 8

Metals and silicates could
exist near the sun because
these compounds have
higher boiling points.

As a result, terrestrial
planets were eventually
formed containing high
concentration of these
compounds.

The terrestrial planets could
not grow in huge diameter
because of the limited
reserve of metallic elements
in the solar nebula.

Answer 8

Formation of Protoplanetary Disk

Question 9

is a small celestial body that once collide together,
it tend to fused to form the planets of the solar system.

Answer 9

Planetesimal

Question 10

Proponents of the Nebular Theory

Answer 10

Emanuel Swedenborg

Immanuel Kant

Pierre-Simon Laplace

Question 11

Drawbacks of the Nebular Theory

Answer 11

Particles surrounding Saturn repel each other which is contrary to the
assumption that dust particles will be attached to each other forming a
planet.

It does not follow the law of angular momentum because if the nebular
theory is correct then the sun should be spinning at a higher rate than
the others.

It did not consider Uranus and Venus, which rotates in a clockwise
direction while other planets rotates in a counterclockwise direction.

Question 12

terrestrial planets of milky way

“near sun, metals whovh have high boiling points, could not grown in huge diameter cause limited mettalic elements”

Answer 12

Mercury
Venus
Earth
Mars

Question 13

jovian planets of mily way

Answer 13

Jupi

Question 14

jovian planets of mily way

“far from the sun, cooler temperature for gas to condense, massive but low density planets

Answer 14

Jupiter
Saturn
Uranus
Nepyure