WorksheetsExoplanets
Total questions: 25
Worksheet time: 24mins
Planets that are found to be orbiting stars outside our solar system are called ___________
rogue planets
super planets
exoplanets
imaginary planets
What is the term for the area around a star where liquid water could be found on it's planets __________________
habitable zone
aqueous zone
zone of life
green zone
How many confirmed exoplanets have been discovered so far?
2-3 thousand
3-4 thousand
4-5 thousand
5-6 thousand
Kepler 186f is an exoplanet in the habitable zone of it's star. It is 558 light years from Earth. When did the light we see today leave that star headed for our telescopes?
1490
1466
1565
1515
What is an exoplanet?
a planet outside our solar system
a planet with an outer shell
a planet in the Kuiper belt
a planet that is easy to fly away from
The method of finding an exoplanet by detecting the light blocked as it passes its star is __________
blocking
eclipsing
parallax
transit
The habitable zone around a star is the area where a planet is most likely to have __________
rings
oxygen
water
life
The very first exoplanets found were ______________
habitable
earth sized
jupiter sized
rogue planets
What new space based telescope is expected to give us lots of new information about exoplanets?
Kepler space telescope
James Webb space telescope
Hubble space telescope
Galileo space telescope
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.
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.
What is the name of the space telescope that was designed to search for exoplanets? And in what year was it launched?
Kepler in 1999
Exodetector in 2009
Kepler in 2009
Hubble in 1999
What is one reason we might not recognize life if we find it?
It could have oxygen as a biosignature.
It could have carbon dioxide as a biosignature.
We might not know what to look for, especially if it is very different from Earth life.
It could have complex carbon molecules as a biosignature.
Some scientists believe life is abundant in the universe because...
we lack the technology to recognize some potential biosignatures
Earth-sized planets in the habitable zone are abundant in the universe
all life requires liquid water
all life requires a source of energy
The idea that we are the only life in the universe because we have not seen any others is the basic concept behind the ________________ _______________.
Olber's Paradox
Fermi Paradox
Anthropic Principle
Gaia hypothesis
