Solar System & Early Earth

Question 1

What is a nebula?

Answer 1

Clouds of dust and gas, products of big bang

Question 2

What is the nebular hypothesis?

Answer 2

Our Sun likely formed from a large mass of collapsing gas within an interstellar cloud

Question 3

The steps for the nebular hypothesis

Answer 3

1. Nebular gas collapses under force of gravity
2. Gravity pulls slowly swirling cloud of dust and gas inward, making it hotter and denser
3. Nuclear fusion begins due to high heat and pressure
4. The cooler outer portions of the solar systems had become compressed enough to condense solid particles and liquid droplets from the gas

Question 4

What is Planetary Accretion?

Answer 4

Through accretion, condensates became the building blocks of the planets, moons, and solid bodies, in the solar system

Question 5

What are terrestrial planets? / Rocky planets

Answer 5

Mercury, Venus, Mars, Earth

Question 6

What are Jovian planets/ gas giants (HYDROGEN AND HELIUM)

Answer 6

Jupiter, Saturn, Uranus, Neptune, Pluto

Question 7

Terrestrial planets are HEAVIER

Answer 7

Mercury, Venus, Earth, Mars

HAVE Silicon, oxygen, Iron, Aluminum, Magnesium

Question 8

Moon Hypothesis

Answer 8

Evidence suggests that Earth was impacted by a large body about the size of Mars during the later stages of its accretion

Question 9

WHEN WAS MOON FORMED?

Answer 9

4.5 Billion Years Ago

Tilted Orbital plane to 23 DEGREES

Question 10

FAINT YOUNG SUN

Answer 10

Sun 30% less bright than it is today

Water should be frozen at surface

3.8 billion years ago, life emerged with the existence of liquid water

Question 11

Early greenhouse gasses of Early Earth

Answer 11

CO2 and CH4 (Methane)

Question 12

Where di Greenhouse Gasses come from?

Answer 12

Earth’s interior Volcanoes,

and weathering of rocks

VERY LITTLE 02 until 2.7 Billion Years Ago