Give two examples each for conduction, convection, and radiation

Conduction: touching a hot pan and the heat going to your fingers; music playing and it traveling to your ears
Convection: heating water up on the stove;putting on the heater in the house
Radiation:heat from sun traveling to earth through rays; putting your hands by a campfire to warm them

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The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .