- What was the traditional view of Mercury, and what does the new view suggest?
- What is unusual about Mercury’s mantle and why does it matter?
- What is one of the theories that explain why Mercury’s mantle is so thin?
- How did scientists discover that the shape of Mercury’s craters has changed with time?
- By comparing current maps of Mercury to older ones
- Through the use of laser measurements
- By consulting old records of Mercury’s rotation
- By monitoring Mercury over a couple of decades
- What is the name of the process which causes geological features to shift around on a planet’s surface?
- Global Shift
- Red Shift
- Polar Movement
- Polar Wander
- What is the most likely explanation for these geological shifts?
- Features were distorted and contracted as the planet’s core cooled down.
- Immense heat from Mercury’s position near the sun means that most of Mercury melts at times.
- Mercury is regularly bombarded by meteor showers
- Mercury’s core is mostly hollow and so the planet is collapsing
- What is unique about Mercury’s core?
- It makes up about 85% of the planet.
- It is surrounded by a solid layer of iron sulphide.
- The outer shell of the planet occupies only about 15% of the total.
- All of the above.
- What is special about the current mission to Mercury?
- It is the last mission to Mercury by an unmanned vehicle
- It is the first mission to Mercury which uses human astronauts
- It is the first mission to Mercury which orbits from the Sun
- It is the last mission to Mercury ever.
- Vocabulary: define the following words.
dynamic
- compelling
- geological
- distorted
- contend
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