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Venus

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Mars is almost volcanically extinct; ... Mars has at least 3 volcanoes larger than those on Earth ... Huge size disparity due to Mars' stationary crust, hence ... – PowerPoint PPT presentation

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Title: Venus


1
Venus
Earth
Mars
Sun
Mercury
Saturn
Jupiter
Uranus
Neptune
Pluto
Extraterrestrial Volcanoes
Barbara Stonewall, M.Ed.
December 19, 2002
2
  • Fires that shook me once,
  • but now to silent ashes
  • fall'n away. Cold upon
  • the dead volcano sleeps
  • the gleam of dying day.
  • Tennyson

3
Volcano Types
Cinder-cone Small, steep, ejected material
returns.
Shield Cone Circular base, gentle slopes,
basaltic, non-explosive.
Composite Cone Large, explosive, fragments plus
lava.
4
Venus
Earth
Mars
Sun
Saturn
Jupiter
Uranus
Neptune
Pluto
Mercury
Past Volcanism on Mercury
Abundance of surface craters No craters more that
50 km in diameter Evidence of lava-filled
craters Volcanic rock samples predate Earth Rock
samples dated _at_ 3000 million years ago
5
Earth
Venus
Mars
Sun
Mercury
Saturn
Jupiter
Uranus
Neptune
Pluto
Volcanic Activity on Venus
80 of the planets surface shows volcanic
activity Several million volcanoes have been
detected Venus is (debatably) volcanically
extinct Many volcanoes are several hundred km
across, and thousands of km high
6
NASA Photo A Volcano on Venus
  • Largest volcanoes are shield-cone type
  • No plate tectonics, which is part of how Earth
    cools
  • Unconfirmed cooling theories hot spot volcanism
  • and/or bubbling, blistering surface volcanoes

7
Earth
Venus
Mars
Sun
Mercury
Saturn
Jupiter
Uranus
Neptune
Pluto
Terrestrial Volcanism is a separate topic
not covered here please refer to your textbook,
the internet, or other relevant Earth-science
resources.
8
Venus
Earth
Sun
Mercury
Saturn
Mars
Jupiter
Uranus
Neptune
Pluto
Martian Volcanoes
Mars is almost volcanically extinct this is
debatable Martian volcanoes are probably all
shield-cone types Mars has at least 3 volcanoes
larger than those on Earth Mars has the largest
volcano in the solar system Olympus Mons
9
Olympus Mons A Shield Volcano on Mars
Earths Largest Volcano Mauna Loa 9 km high
120 km across
Olympus Mons 24 km high 550 km across
x 3
Mars 1/2 of Earths diameter Olympus Mons 3
times the size of Earths largest Volcano Huge
size disparity due to Mars stationary crust,
hence enormous hot-spots that build-up in
stationary positions
10
Mars
Sun
Mercury
Saturn
Jupiter
Venus
Earth
Uranus
Neptune
Pluto
Volcanoes on Io A moon of Jupiter
The most volcanically active place in the solar
system At least 8 active volcanoes have been
mapped Plumes extend 280 km above Ios
surface Molten rock spews out faster than the
speed of sound The size of Io is Earths
moon Jupiter 318 times more massive than Earth
itself Io and Earths moon same orbit, but Io
has greater gravitational stress, causing huge
amounts of internal heat
11
Io One of Jupiters Moons
12
Io Images from Galileos Mission
(Raw images)
(Digitally remastered)
13
Io Lesson Plans Activities presented by
ThursdaysClassroom.com August 3, 2001 Thursday's
Classroom Corner These stories and lessons are
based on the Science_at_NASA article "Another Daring
Adventure for Galileo" KIDS STORIES These
far-out discussion questions are as hot as the
volcanoes on Io. lesson plan questions Me-O,
My-O, Io! Students will use the words in the
kid's stories and the Volcano Glossary to create
their own volcanic verse. Sample poems include
Haiku, limerick and simple rhyming forms. lesson
plan activity sheet sample poems
glossary Volcano Jeopardy Divide your class
into competing teams and play this fun game
designed to familiarize students with volcanoes
all over the Solar System. lesson plan
Jeopardy Questions Volcanoes Around the Solar
System Io Pizza Party Some scientists think Io
looks like a gigantic pepperoni olive pizza.
Students can decide for themselves by making
their own Io Pizza Pie and comparing their work
to pictures of Io. lesson plan Io
picture Paper Clip Quicky In this quick and
easy lesson, students use paper clips to
understand how Io got so hot on the inside.
lesson plan
14
Jupiter
Venus
Earth
Mars
Sun
Mercury
Saturn
Uranus
Neptune
Pluto
Volcanoes on Other Moons of Jupiter
Europa and Ganymede have Cryovolcanism!
15
Venus
Earth
Sun
Neptune
Mercury
Saturn
Jupiter
Uranus
Mars
Pluto
Triton The seventh (and largest) of
Neptunes Moons also features Ice Volcanoes!
16
Triton is the only large moon with a retrograde
orbit Temperature equals Plutos -235ºC Surface
contains only a few craters The surface is young
older features destroyed Ice Volcanoes! Liquid
Nitrogen??
17
?
?
Uranus
Sun
Saturn
Venus
Earth
?
Neptune
Mars
Mercury
Jupiter
?
Pluto
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
Scientists continue to search for evidence of
extraterrestrial volcanism……
18
Websites Used for Research can be found
at www.deafscience.net under the Astronomy
category And…on your Earth Science Class
Web you can download the document E.T.
Websites.
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