This dinosaur lived long ago on Earth in a tropical climate. The dinosaurs were killed and became extinct because of a change in climate. That new climate was called an ice age. What type of fossil would we find that would support the theory that Earth experienced an ice age?

A) A
B) B
C) C
D) D

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

emerging idea only occurs as a raw idea that could appear out of nowhere. meanwhile, to reach scientific consensus , that idea must be structured and tested over and over again through various experiments. the scientific consensus transforms the raw idea into idea that is more reliable through the process of scientific elimination.