What causes a rainbow?

What is the name of a large, swirling storm system that forms over warm ocean waters?

What type of natural phenomenon is an aurora borealis?

What causes tides?

What is a tsunami?

What is a landslide?

What is an eclipse?

Which natural phenomenon is associated with the rapid expansion of air?

What is a comet?

What is the name given to the glowing trail left by a meteoroid as it burns up in the Earth's atmosphere?