Question

distinguish between physical and chemical weathering biology

Answer 1

Chemical change:Bonds have changed; the substances present before the change, are different from those present after the change.A substance reacts to form a new chemical entitysame atoms are used, but different molecules have been created.Examples:The electrolysis of water: the products are two different substances;Combustion of hydrogen in oxygen; forms water and generates heat;The body's combustion of glucose produces carbon dioxide and water;Bread made into toast (partially oxidized bread) is not reversible;Wood burned in a fireplace is not reversible;Burning of the World Trade Center.Physical Change:State, size, shape, or color of a substance is changed basic character-unchanged; Change of physical properties, leaving basic character-unchanged.Examples:Melting of ice: change of state;Bearing gold into a ring;Grinding;Cutting;Folding;Collapse of the World Trade Center