What are two differences between a warm front and a cold front?

Which line in the graph above best illustrates an effect of the carbon dioxide level in the blood on breathing rate before, during and after a period of exercise? 1.b,2.c,3.a,4.d

An uncomfortable feeling in the ears when descending in an airplane is caused by changes in air pressure on the: a. inner ear b. middle ear c. eardrum d. hammer/anvil

Which individual would be the safest from a lightening strike? a. a person standing 8 miles away b. a person on a bike 8 miles away c. a person in a tent 8 miles away d. a person in a house 8 miles away select the best answer from the choices provided a b c d