The process of begins in the mouth, where for is ground into small pieces. a) excretion b)saliva c)waste d)digestion

Brainliesttt me asap! the below reaction can be categorized as more than one type of reaction. which reactions are these, and what are the types of reactions?

Electrons are extremely important to what area of technology? a) anti-aging research b) household product development c) electronics d) drug discovery

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?