Amolecule is: a. a mixture of various components that can vary b. a combination of many atoms that will have different ratios c. a combination of one or more atoms that will have a fixed ratio of its components

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

Some of the money that people deposit into a bank eventually becomes a interjection into the economy when the bank

Drag the tiles to the boxes to form correct pairs. match the causes with their effects cause: tectonic plates at transform boundaries experience friction. cause: tectonic plates at transform boundaries experience friction. cause: earth is covered by a crust that runs miles deep.