EVERYDAY SCIENCE

Detailed explanation-1: -Chemical weathering occurs when water dissolves minerals in rocks, resulting in new compounds. This is also known as hydrolysis. An example would be when water comes in the proximity of granite. Feldspar crystals present inside the rock react chemically, forming clay minerals.

Detailed explanation-2: -The patina that forms on copper roofs is a result of weathering and changes in the chemical composition of the metal. It’s a process of oxidation that happens over time that turns copper green. Other metals can acquire a patina as well. Even old wood furniture can get a sheen of oxidation in time.

Detailed explanation-3: -Chemical weathering changes the composition of a mineral to break it down. Water chemically weathers rock in hydrolysis. Carbon dioxide chemically weathers rock by creating acids. Oxygen chemically weathers rock by combining with a metal.

Detailed explanation-4: -Physical, or mechanical, weathering happens when rock is broken through the force of another substance on the rock such as ice, running water, wind, rapid heating/cooling, or plant growth. Chemical weathering occurs when reactions between rock and another substance dissolve the rock, causing parts of it to fall away.