Physical earth

Question 1

Big Bang Theory?

Answer 1

– How the Universe began 13.8 billion years ago .

All matter, space and time began with a small singularity and has “inflated” to the cosmos we know today.

Question 2

Nebular Hypothesis

Answer 2

– Formation and evolution of the Solar System.
Collapse and rotation of a cloud of interstellar gas and dust.
Formation of protosun, protoplanets and other solar system constituents.

Question 3

what were the two ways the solar system evolved?

Answer 3

1. Protosun heats up.

2. Planetary embryos became larger.

Question 4

how was the sun created?

Answer 4

The protosun reaches 10 million°C, initiating a nuclear fusion reaction – the Sun is born.

Question 5

what units are used to measure things in the solar system

Answer 5

astronomical units

Question 6

Earth’s primitive atmosphere – the “first” atmosphere was mostly made of what?

Answer 6

carbon dioxide.

Question 7

how were oceans created?

Answer 7

outgassing from Earth’s interior and delivered by comets and meteors.

Question 8

what are cratons?

Answer 8

old crustal blocks within continents.