Question

answer questions number 4,5,6

Answer 1

1. nitrogen is used to burn anything show that nitrogen is important to the human beings
2. if there will be no oxygen in water then there will be no interchange of oxygen and carbon dioxide carbon dioxide and if there will be no changes the animal will not able to take carbon dioxide because air is a mixture of gases and in a carbon dioxide Oxygen and nitrogen everything is important and when the humans go in water for swimming or any other thing they also need oxygen but inverted there is a there is level of oxygen is decreased and level of carbon dioxide is increased in the human or a person needs oxygen mask. so that's why all season is important in water
3. water droplets are formed on the glass of ice because when ice melts their the vaporizers up and some of the web pages is trick with the glass and eats come outside of the glass in the form of the drops so that's why water droplets are form on the glass of the eyes and in a General form reduce the form and in general form people say that it is a common thing