Vocabulary lesson Bermuda Triangle

to make something bad happen

an idea that says how or why something happens

a small sign that something has happened or been there

an event that is unpleasant or unusual

reasons for believing that something is or is not true

what is left of something that has been badly damaged or destroyed

to disappear suddenly and completely

difficult to understand or explain

a situation in which someone or something can no longer be found or seen

a reason you give for something that has happened