Sure! Here are the answers:
- Humans live in the troposphere, which is the lowest layer of Earth's atmosphere.
- The most common gases in Earth's atmosphere are nitrogen (about 78%) and oxygen (about 21%).
- The ozone layer is found in the stratosphere, which is the second layer of the atmosphere.
- If Earth's atmosphere vanished, there would be no air to breathe, and the planet would become uninhabitable due to extreme temperatures and radiation from the sun.
- No, it is not possible to find an airplane 500 km (200 miles) above Earth's surface, as that is far above the altitudes where aircraft can safely fly.
- Yes, if you are flying in a hot air balloon at high altitudes, you might need an oxygen mask due to lower oxygen levels.
- Protecting the ozone layer is important because it helps shield the Earth from harmful ultraviolet (UV) radiation, which can cause skin cancer and damage to ecosystems.