2. What do you think would be required to make it
possible for humans to survive on other planets? Make
sure you describe the environmental conditions on at
least two different planets.
5. Mars' atmosphere is much thinner than that
surrounding the earth. It is composed mainly carbon
dioxide with small amounts of nitrogen, argon, oxygen,
carbon monoxide, neon, krypton and xenon. There are
also tiny traces of water vapour, probably from the
evaporation of the polar caps.
6. Mars has two small moons that travel around it. The closest one,
Phobos, is also the largest of the two. It has a diameter of about
fourteen miles at the equator and about eleven miles from pole to pole.
It makes its revolution around Mars in about seven and a half hours.
The smaller satellite, Deimos, has a diameter of about six miles and
makes its journey around Mars in thirty hours. Asaph Hall, an
American astronomer, discovered both the satellites in 1877.
7. Maximum temperature of mars is -5
degrease Celsius
Minimum temperature of mars is -120
degrease Celsius
8. Mars is about four-fifths as dense as the earth but its
mass in only about one-tenth that of the earth. Thus,
its force of gravity is only about three-eighths that of
the earth. A 100 pound object on earth would weigh
about 38 pounds on Mars.
9. Mars is a terrestrial planet. It has a hard rocky surface
that you could walk on. Mar’s surface is dry and is
much covered with reddish dust and rocks. Mars has
to permanent polar ice caps.
10. The surface gravity of mars is only about 39% of the
surface gravity on earth. If you weigh 100 pounds on
earth then you would only weigh 38 pounds on mars.
14. As said before Uranus' atmosphere is about 83%
hydrogen, 15% helium and 2% methane.
There are also traces of water and ammonia. The
planet's atmospheric details are very difficult to see in
visible light. The methane gas above the cloud layers
gives it a blue-green colour.
15. The Planet Uranus has many moons. Five of largest are
Miranda, Titania, Oberon, Umbriel, Ariel. The largest
moon is Titania with a radius of only 788.9 km (less
than half that of our Moon).
17. Uranus is a 'Gas Giant' with no solid surface.
More than 80 percent of the mass of Uranus is
contained in an extended liquid core consisting
primarily of 'icy' materials (water, methane and
ammonia) with higher-density material at depth.
