why does science fair cost a third of your grade when you're the one who has to pay for all of the supplies?

What is the term for a re-current musical section between various contrasting sections

Which clef would be used for the violin? a. treble b. tenor c. bass d. alto what causes sound? a. electric fields b. magnetic fields c. vibrating electrons d. vibrating molecules

Reporter christopher wren wrote about the miraculous escape from bombing of the dome of st. paul’s cathedral, designed by sir ernest pyle true or false