Name The Year: Explorer VI reveals an intense radation belt around the Earth.?

Questions

A lightning bolt generates temperatures ---------- times hotter than those found on the sun's surface.?

A manned rocket reaches the moon in less time than it took a ---------- to travel the length of England.?

A normal raindrop falls at about ---------- miles per hour.?

A penny whistle has ---------- finger holes.?

A rainbow can only occur when the sun is ---------- degrees or less above the horizon.?