8. Give reasons for the following II

1. Ice floats on water.

 

 

When you put ice cubes in water at room temperature, they will float on top. This is because ice has a lesser density lesser masslesser volumelesser space than water.

2. Aquatic animals can breathe in water.

 

 

AirNitrogenCarbon dioxide dissolved in water is important for aquatic animals to survive. Aquatic animals extract nitrogencarbon dioxideoxygen from the water and expel water. They can breathe only through the dissolved oxygennitrogencarbon dioxide present in water.