Earth's atmosphere has five primary layers, listed from the surface upward:
1. ✅ Troposphere: 0–12 km (0–7 miles), where weather occurs.
2. ✅ Stratosphere: 12–50 km (7–31 miles), contains the ozone layer.
3. ✅ Mesosphere: 50–80 km (31–50 miles), where meteors burn up.
4. ✅ Thermosphere: 80–700 km (50–440 miles), includes the ionosphere.
5. ✅ Exosphere: 700–10,000 km (440–6,200 miles), merges with space.
Sometimes, the ionosphere (overlapping thermosphere and exosphere) and magnetosphere (beyond exosphere) are considered additional regions due to their unique properties, but the five layers above are the standard classification.