Water Pollution
Water pollution is when harmful things get into rivers, lakes, or oceans and make the water unsafe.
Think of it this way
A glass of clean water sits on a counter. You drip a few drops of food coloring into it, and the color spreads through every part of the glass. The water is no longer clear or safe to drink. Even a small amount of dye changes the whole glass.
Explaining water pollution by grade level
When oil or trash gets into a lake, the water becomes dirty. Fish and plants in the water can get sick. People use soft pads to soak up the oil. Cleaning the water helps the fish and plants stay healthy.