Fermi paradox

What is the habitable zone?

• the area in the universe where life could exist

• the area on a planet where life could exist

• the area in a galaxy where life could exist

• the area around a star where life on a planet could exist

What is a Type 1 civilization?

• Able to harness all the available energy on its planet

• Able to harness all the available energy of its home star

• Able to harness all the available energy in its galaxy

What is the Fermi Paradox?

• Even with the huge number of planets in the Milky Way, we haven't seen any signs of aliens

• It would take a couple of million years to colonize the whole galaxy.

• There are three different possible levels for a civilization.

• There are no aliens in the universe.

A "great filter" is something that "filters out" life over time. In other words, barriers that make it difficult for life (a civilization) to continue to grow, develop, evolve, and expand.

• True

• False

Tags

NGSS.HS-LS2-6

What is the first option for a Great Filter explanation of the Fermi Paradox?

• there are great filters and we have already passed through them

• There are no great filters

• The formation of Earth was not as hostile as it is for other civilizations.

Tags

NGSS.HS-ESS1-6

What is the second possible Great Filter explanation for the Fermi Paradox?

• There are great filters and they are all ahead of us.

• Technology is the great filter that will destroy humanity.

• There are no great filters.

• Climate change is a great filter.

Another possible explanation for the Fermi Paradox is that humans are alone in the universe. Is this a "great filter" explanation?

• yes

• No

Which is the best definition of Fermi Paradox?

• The contradiction between the lack of evidence for extraterrestrial intelligence and the presumed high probability of them.

• The idea that there is definitely intelligent life in the universe.

• A hypothetical megastructure that completely encompasses a star and captures a large percentage of its power output.

Even in theory, it is impossible to travel to other stars

• true

• false

How long has there been life on Earth?

• 250,000 years

• 8.4 million years

• 3.6 billion years

• 100 trillion years

Tags

NGSS.MS-LS4-1