Weather, Climate and the Water Cycle: Grade 6 Study Guide
Weather changes by the day, while climate describes long-term patterns.
Weather is the condition of the atmosphere at a particular place and time: temperature, wind, humidity, air pressure and precipitation. Climate is the average pattern of weather in a region over many years (usually 30 or more).
Energy from the Sun drives the water cycle. Water evaporates from oceans, lakes and plants, rises, condenses into clouds and falls as precipitation. Gravity moves the water back to oceans through runoff and groundwater.
Air masses and fronts
An air mass is a large body of air with similar temperature and moisture. Where two air masses meet is a front. A cold front brings quick changes: thunderstorms, then cooler, drier air. A warm front brings gradual, steady rain and warmer weather. High pressure usually means clear weather and low pressure means clouds and rain.
| Front | What happens | Typical weather |
|---|---|---|
| Cold front | cold air pushes under warm air | storms, then cooler and clear |
| Warm front | warm air slides over cold air | light rain, then warmer |
| Stationary front | neither air mass moves | days of clouds or rain |
What shapes climate
Climate depends on latitude (how directly the Sun's rays strike), elevation, distance from the ocean (oceans keep temperatures steadier), ocean currents and prevailing winds. Places near the equator are warm all year; polar regions are cold. Mountains block moisture, creating a dry rain shadow on the far side.
Closer to the equator is warmer.
Higher means cooler.
Milder temperatures.
Rain on one side, dry on the other.
Reading weather data
A weather map uses symbols for fronts and isobars (lines of equal pressure). Meteorologists collect data from satellites, radar, balloons and ground stations and use computer models to forecast. A forecast gives the chance of rain as a probability. Climate scientists study long-term records and find that global average temperatures have risen over the last century; the evidence and causes are summarized by NASA and NOAA.
Worked example and common misconceptions
Example: A cold front moves through town: pressure falls, clouds build, a storm passes and the air turns cooler and clearer. Common misconceptions: confusing weather with climate ('it was cold today, so the climate isn't warming') and thinking clouds are made of smoke. Keep a weather log for a month and compare it with the forecast.
Check your understanding: model answers
1. A cold front. 2. For example, latitude and nearness to the ocean. 3. Weather is the condition of the air now; climate is the long-term average pattern.
✨ Key Takeaways
- Weather is short term; climate is long term.
- The Sun drives the water cycle.
- Fronts bring changes in weather.
- Latitude, elevation and oceans shape climate.
💬 Questions for Discussion & Reflection
- Which front often brings thunderstorms?
- Give two factors that affect climate.
- What is the difference between weather and climate?
Print a science observation log →