Vocabulary in Context

1. fluorescent bright and glowing loops moves in a circling way particles tiny pieces nucleus center of a comet solar wind continuous flow of gases from the Sun force power that causes motion or change Vocabulary in Context Comet Watching MARIA: Look! I see a comet. It’s glowing like a ____________________ light. ARNOLD: Will the __________________ of gravity pull the comet to Earth? PROFESSOR: No. The comet __________________ around the sun. MARIA: What is the head of the comet called? PROFESSOR: It’s called the ______________________. Do you see the comet’s long tails? Some of them contain _____________________, or tiny bits, of dust. ARNOLD: What else can you tell us about comets? PROFESSOR: The Sun’s ________________ _______________ blows a comet’s tails out behind it. MARIA: I didn’t know that comets had more than one tail. ARNOLD: I want to know more about them. I’m going to the library for a book. Thanks, Professor!