Why does the earth have different time zones

The earth rotates around the sun, which makes the daylight and nighttime times different

Explanation:

Apparent and mean solar time can differ by up to around 15 minutes (as described by the equation of time) because of the elliptical shape of the Earth's orbit around the Sun (eccentricity) and the tilt of the Earth's axis (obliquity)

Explanation:

supercell thunderstorms are perhaps the most violent of all thunderstorm types, and are capable of producing damaging winds, large hail, and weak-to-violent tornadoes

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?