Solar activity and the inner planets
Answers are for parents and teachers.
1
A CME at 2000 km/s: how many seconds does 150,000,000 km take? (150,000,000 : 2000)
75000
2
How many days are 3 Mercury years? (88 · 3)
264
3
The 92 atm on Venus corresponds to what ocean depth in metres? (92 · 10)
920
4
Write two differences between Mercury and Venus.
Mercury has no atmosphere while Venus has a thick one; Mercury is smaller with an 88-day year, Venus rotates backward.
5
Why do satellites sink faster in years of high solar activity?
UV light and particles heat and expand the upper atmosphere, increasing drag.