What is the function of air holes in the soil? what is the major difference between manure and humus. mention 3 points for ! sometimes u people won't !

2. how is heavy water different from normal water

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

Scientific evidence tells us that the cause of earths four season is the tilt of earth as it revolves around the sun. the student is instructed to illustrate this information in a science notebook. how will the student illiterate winter in the northern hemisphere?