1. dating of surfaces from counts of impact craters
If we can determine the rate at which craters form on a planets surface, we can
tell when the last time a surface formed by the number of craters on it. Also if the
numbers of craters in different regions is similar, then the whole surface formed
around the same time.
2. different volcanic features on Venus, Earth, Mars: describe and explain
Venus – vast plains of magma and lava, large volcanoes in the highlands, large
shield volcanoes like those on Earth, has every volcanic feature that’s on earth.
--Differences due to different composition, lack of plate motion, and a weaker,
Mars – huge towering shield volcanoes due to a deeper solid crust that can
support a bigger volcano, and lower gravity on Mars. Also has the tallest
mountain in the solar system. (Olympus Mons)
3. surface temperatures on Venus, Earth, Mars: describe and explain
Venus – 735 K – Dense atmosphere creates a strong greenhouse effect.
Earth – 288-293K – greenhouse effect and composition keep planet’s
temperature around constant.
Mars – 140-300K – Greatly depends on the sun. Little atmosphere because of
very little gravitational pull to hold temperatures.
4. different geological features on Venus, Earth, Mars: compare and explain
heights of mountains, continents
Venus – High volcanoes similar in height to the Himalaya Mountains on earth.,
no continental drift, but convections of the magma below ground compress and
expand the ground causing volcanoes and “pileups” Overall pretty flat.
Earth - continental drift, volcanoes, mountains, oceans etc.
Mars – huge volcanoes, northern hemisphere is a large ocean basin, southern is