Carole owns a two story house with a heating and cooling unit on each floor. in the winter she mostly uses the downstairs unit because the volume of warm air and warming the whole house through a) expands, rises, convection b) expands, sinks, conduction c) contracts, rises, conversion d) contracts, sinks, contraption submit hint

(A) expands, rises, convection

Carole owns a two story house with a heating and cooling unit on each floor. In the winter she mostly uses the downstairs unit because the volume of the warm air expands and rises warming the whole house through convection.

As the convection is a process in which heat passes from one place to another.

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.