Select the correct sequence of steps for lighting a Bunsen burner.

A. Apply the spark above the barrel of the Bunsen burner.
B. Open the gas adjustment at the base of the Bunsen burner.
C. Connect the burner hose to the gas outlet.
D. Open the gas valve on the gas outlet.
A.
C, D, B, A
B.
C, D, A, B
C.
C, A, D, B
D.
D, C, A, B

a. by using fur or clothes to trap heat energy near the body

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.