How Life Began

When did multicellular organisms first appear?

3.5 billion years ago

When did life first appear on Early Earth?

3.8 billion years ago

What elements are all living things made of?

Carbon, hydrogen, oxygen and nitrogen

Greenland has the oldest rocks on Earth but no fossils. What is so important about these rocks?

The rocks hold the carbon content and all living things have carbon so it shows there could've been life on early earth. there were no fossils because they all got incinerated by the heat

How might've life survived underground during the heavy bombardment?

Underground was deep enough to protect from the bombardment and the chemicals made were nitrogen suffice.

How did oxygen get to Earth? Where did it first end up and when?

When bacteria came, they photosynthesized. It ended up in the oceans 560 million years ago

What elements have been brought to Earth from space particles?

amino acids, which turned into peptides

What was the Stanley Miller experiment?

he simulated Earth's atmosphere by creating an electric charge through a flask which represented the atmosphere, creating amino acids

The heavy bombardment brought with it..

oceans and a tectonic plate system, the temperature also decreased

What do snottiest tell scientists about early life?

they show that there was bacteria for the first time which meant there was living things on earth