10 Claims • Evidence • Reasoning Do you agree or disagree with the following
statement? Both theories and laws can
be used to predict what will happen in a
situation that has not already been tested.
State your claim. Provide evidence to support
the claim, and explain your reasoning.
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.

air enters through the nose, moves through the nasal cavity, the pharynx, the larynx, enters the trachea, moves through the bronchi andbronchioles till the alveoli.

not always but somethings can be reproduced in a laboratory.