Which of the following is an example of convection?
a hot object transferring heat to a cooler one
hot air rising and cooler air falling
the rays of the sun warming the earth
a hot oven warming the air around it

They are all decomposition reactions.

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Those are different gas lawshere is a brief description of themcharles's law states that volume and temperature are directly proportional to each other as long as pressure is held constant.  boyle's law asserts that pressure and volume are inversely proportional to each other at fixed temperature.gay-lussac's law introduces a direct proportionality between temperature and pressure as long as it is at a constant volume.    source: