Solar system

Question 1

How was the solar system formed?

Answer 1

1) Stated as small point then rapid expansion after Big Bang
2) As expanded hydrogen bonds formed as it cooled, protostars formed inside nebulae
3) H2 fuses to Helium forms a star, forms heavier elements
4) Initial stars collapse, generating heat, heavy element production and explosions (forms nebulae)
5) Nebulae cloud, gas and debris coalesce and condenses into a protoplanetary disk, which spins around central mass
6) As centre heats up nuclear fusion begins and P disks align to rings
7) These coalesces forming planetesimals, which accumulate and differentiate

Question 2

What does a nuebular condense into?

Answer 2

Protoplanetary disk

Question 3

What do protoplanetary disk coalesces into?

Answer 3

Planetesimals

Question 4

How was the moon created?

Answer 4

Planet called The collided with young Earth, this removes some of the mantle forming the moon

Question 5

Why was the earth originally inhospitable?

Answer 5

Volcanic activity and release go gases

Question 6

What could have transferred amino acids to Earth?

Answer 6

Comets

Question 7

What are the Oort Cloud and Kuiper belt?

Answer 7

Oort Cloud - contains objects made of ice
Kuiper belt - contains ice objects and dwarf planets

Question 8

What occurred in the Archean eon?

Answer 8

• start of plate tectonics
• oldest rocks originate this time

Question 9

What occurred in the Proterozoic eon?

Answer 9

• evolution of cyanobacteria (more O2)
• more aerobic respiration (eukaryotic0
• forms ozone layer

Question 10

What are the Milankovitch cycles

Answer 10

Precession
Eccentricity
Tilt

Question 11

Facts about sun

Answer 11

• Sun is a virtual black body (bb radiation)
• Absorbs all electromagnetic radiation
• Defined emission spectrum