Question 1 The Drake equation attempts to define the number of planets in the Milky Way Galaxy planets with life in the universe stars with planets like Earth civilizations ID: 644423
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Slide1
© 2017 Pearson Education, Inc.Slide2
Question 1
The Drake equation attempts to define the number of
planets in the Milky Way Galaxy.planets with life in the universe.stars with planets like Earth.civilizations in our Galaxy.terrestrial planets with water.
© 2017 Pearson Education, Inc.Slide3
Question 1
The Drake equation attempts to define the number of
planets in the Milky Way Galaxy.planets with life in the universe.stars with planets like Earth.civilizations in ourGalaxy.terrestrial planets with
water
.
© 2017 Pearson Education, Inc.Slide4
Question 2
In the Drake equation, a technical civilization is defined as one that is able to
explore space. communicate over interstellar distances.communicate using a written language.construct metal tools.travel at the speed of light.© 2017 Pearson Education, Inc.Slide5
Question 2
In the Drake equation, a technical civilization is defined as one that is able to
explore space. communicate over interstellar distances.communicate using a written language.construct metal tools.travel at the speed of light.© 2017 Pearson Education, Inc.Slide6
Question 3
The possibility of life once existing on Mars was supported by the discovery of
mudflows and bodies of liquid water existing inthe past. water, rather than dry ice, at the south polar cap.the spectral signature of chlorophyll. the face on Mars.volcanoes that are still active.
© 2017 Pearson Education, Inc.Slide7
Question 3
The possibility of life once existing on Mars was supported by the discovery of
mudflows and bodies of liquid water existing inthe past. water, rather than dry ice, at the south polar cap.the spectral signature of chlorophyll
.
the face on Mars.
volcanoes that are still active.
Explanation: The exploration of the Mars
rovers
Spirit
and
Opportunity,
as
well as the
Global Surveyor
mission
, have provided evidence that
water
did exist on Mars in the past.
© 2017 Pearson Education, Inc.Slide8
Question 4
The habitable zone is the area where
temperatures on a planet are reasonable.terrestrial planets can form around a star.terrestrial planets could have liquid water on their surfaces.liquid water can condense into rain in the atmosphere.Sun-like stars can exist in
the Milky
Way Galaxy.
© 2017 Pearson Education, Inc.Slide9
Question 4
The habitable zone is the area where
temperatures on a planet are reasonable.terrestrial planets can form around a star.terrestrial planets could have liquid water on their surfaces
.
liquid
water can condense into rain
in the atmosphere.
Sun-like
stars can exist in
the Milky
Way
Galaxy.
Explanation:
Habitable
zones have the right
temperature
for
life—neither
too hot nor too cold.
Habitable
zones must be smaller and closer to a
cool
star like the Sun because such a star emits
less
warming radiation.
© 2017 Pearson Education, Inc.Slide10
Question 5
Which star is the best candidate for seeking
extraterrestrial life? Spica, a B-type main-sequence star61 Cygni, a K-type main-sequence starSirius B, a white dwarfAntares, an M-type supergiantBarnard’s star, an M-type red dwarf© 2017 Pearson Education, Inc.Slide11
Question 5
Which star is the best candidate for seeking
extraterrestrial life? Spica, a B-type main-sequence star61 Cygni, a K-type main-sequence starSirius B, a white dwarfAntares, an M-type supergiantBarnard’s star, an M-type red dwarfExplanation:
In
the OBAFGKM spectral ranking scale, K-type main-sequence stars are cooler than the Sun, but will shine long enough with nonlethal radiation to allow life to form and evolve.
© 2017 Pearson Education, Inc.Slide12
Question 6
The
“water hole” is a regionin radio light where natural emissions from our Galaxy are minimal.on Mars where liquid water has been proven to exist in the past.on the Moon where water is believed to exist
under
ice
in a deep crater.
in the Oort cloud where comets rich
in water are formed.
© 2017 Pearson Education, Inc.Slide13
Question 6
The
“water hole” is a regionin radio light where natural emissions from our Galaxy are minimal.on Mars where liquid water
has been
proven to
exist in the past.on
the Moon where water is believed to exist under
ice
in a deep crater.
in
the
Oort
cloud where comets
rich
in water are formed.
Explanation: The
“
water hole
”
may be
the
best part
of the electromagnetic
spectrum
for
intelligent
civilizations to communicate across the vast reaches of space.© 2017 Pearson Education, Inc.Slide14
Question 7
An
extremophile isan extremely unlikely place to search for life.a planet that has very extreme temperatures.a planet whose orbit lies beyond Pluto in the most distant regions of our solar system.a life-form adapted to very extreme environments.
© 2017 Pearson Education, Inc.Slide15
Question 7
An
extremophile isan extremely unlikely place to search for life.a planet that has very extreme temperatures.a planet whose orbit lies beyond
Pluto
in the most distant
regions
of our solar system.a life-form adapted to very
extreme
environments.
© 2017 Pearson Education, Inc.