An occluded front forms when a warm air mass is caught between two cooler air masses. The warm air mass is cut ofl or occluded' from the ground. The occluded warm front may cause clouds and precipitation. A swirling center of low air pressure is called a cyclone.
Adding hot cocoa to hot water would be a chemical change
I don't know sorry I really need point
Carbon 14 because it has an approximate half life of 5000 years.
the semipermeable membrane surrounding the cytoplasm of a cell.
