Rocks in a stream constantly knock and scrape against each other and against the stream bed as the flowing water carries them along. This is an example of: (1 point)
chemical weathering
thermal weathering
mechanical weathering
O gravitational weathering.

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

they vary. it used to be meat, grain, bread, candy, beverages, donuts, and fruits/vegetables. now they added exercise in.