Views of the world’s structure. Scale of the Solar System
Answers are for parents and teachers.
1
Light from the Sun reaches Venus at 0.72 AU: in how many seconds (≈ 0.72 · 500 ≈ 360)?
360
2
The Earth–Sun distance is 150 million km; light moves at 300,000 km/s. In how many seconds does it arrive?
500
3
Jupiter is at 5 AU. How many seconds does light need from the Sun to Jupiter? (5 · 500)
2500
4
Write two differences between terrestrial and giant planets.
Terrestrial planets are small, rock-and-metal, dense, with few moons; giants are large, mostly gas/ice, ringed and with many moons.
5
Why are the Moon and Ganymede not counted as planets?
They orbit planets, not the Sun (they are satellites).