Here's a breakdown:
* Warm Weather: Molecules in the air are moving faster, on average, than in cold weather. This means they have more kinetic energy, and we perceive this as warmth.
* Cold Weather: Molecules in the air are moving slower, on average, than in warm weather. This means they have less kinetic energy, and we perceive this as coldness.
Factors Affecting Temperature:
* Solar Radiation: The sun is the primary source of heat for the Earth. The angle at which sunlight strikes the Earth's surface and the amount of time the surface is exposed to sunlight affect temperature.
* Latitude: Places closer to the equator receive more direct sunlight and have warmer temperatures, while places closer to the poles receive less direct sunlight and have colder temperatures.
* Altitude: As you go higher in altitude, the air becomes thinner and less capable of retaining heat, resulting in colder temperatures.
* Ocean Currents: Warm ocean currents transport heat from the tropics towards the poles, while cold ocean currents transport cold water from the poles towards the tropics.
* Landmasses: Land heats up and cools down faster than water, leading to greater temperature variations between day and night and between seasons.
Temperature Scales:
* Celsius (°C): Water freezes at 0°C and boils at 100°C.
* Fahrenheit (°F): Water freezes at 32°F and boils at 212°F.
* Kelvin (K): This is an absolute temperature scale where 0 K represents absolute zero, the theoretical point at which all molecular motion ceases. Water freezes at 273.15 K and boils at 373.15 K.
In summary: Warm weather and cold weather are determined by the average kinetic energy of molecules in the air, which is influenced by factors like solar radiation, latitude, altitude, ocean currents, and landmasses. We use temperature scales to measure and quantify these differences.
