The Supercontinent That Changed Everything!

Which of these is a vestigial structure in humans?
Which of these waves does not require a medium to travel?
Which property measures how much a material can stretch before breaking?
What is the measure of a material's resistance to deformation?
What is the name for a type of fold that is arched upward?
What is the name for the layer of Earth's atmosphere closest to the surface?
What is the name for the supercontinent that existed about 250 million years ago?