ÔùÖ Atmospheric Pressure ÔùÅ What is a high-pressure system? ÔùÅ What is a low-pressure system? ÔùÅ What causes heavy downpours? ÔùÅ Why do typhoons occur? ÔùÅ How do typhoons develop? ÔùÅ How are typhoons observed?rnrnÔùÖ Wonders in the Sky ÔùÅ What is a rainbow? ÔùÅ What are mirages? ÔùÅ How do solar and lunar halos form? ÔùÅ What causes mountain halos? ÔÃ…
ÔùÖ The Air Above ÔùÅ How did the atmosphere form? ÔùÅ How is the atmosphere divided? ÔùÅ Where does the atmosphere end? ÔùÅ What is the ozone layer? ÔùÅ What is the ionosphere? ÔùÅ What causes the aurora? ÔùÅ What are the Van Allen belts? ÔùÅ Why doesn't the sun burn Earth? ÔùÅ Why is the sky blue during the day but red at sunset? ÔùÅ Why is it colder on mounta…