This is a bay. The easiest way to tell a bay and lake apart is a bay almost always connects to a body of water like an ocean and lakes. Bay's also have salt water and lakes have fresh water
This is a river. The easiest way to tell a river and stream apart is rivers flow to oceans and drop off water where streams have a current and have constant movement. Rivers and streams both have fresh water.
This is an ocean. The easiest way to tell a ocean and sea apart are seas are smaller parts of the ocean.
This is a glacier. Glaciers are frozen water that slowly travels the earth picking up anything in its path. Glaciers can travel for years and still be a solid.
This is groundwater. Groundwater is water that sunk through earths surface and into the soil. Groundwater is how the soil stays moist underground.
This is the atmosphere. The atmosphere holds water vapor. It moves by evaporation. The atmosphere keeps earth healthy.