Learners explore weather as a natural phenomenon that changes from day to day and varies by season and location. Students observe and classify different types of weather, discover what makes weather change, and learn how scientists gather data to make forecasts. The lesson builds a foundation for later study of the water cycle, climate, and Earth systems.

Key Ideas

• Weather describes what the atmosphere is like at a specific time and place. Temperature, wind, clouds, and precipitation are all parts of weather.
• Weather changes because the sun heats different parts of Earth's surface unevenly, which causes air to move.
• Clouds form when water vapor in the air cools and collects around tiny particles. Different cloud types signal different kinds of weather.
• Precipitation happens when water droplets in clouds grow heavy enough to fall. It can fall as rain, snow, sleet, or hail depending on temperature.
• Weather follows seasonal patterns. Most places have predictable weather for each season, though individual days can vary.
• Meteorologists are scientists who study weather. They use tools like thermometers, rain gauges, wind vanes, and satellites to collect data and make forecasts.

Vocabulary

• Weather: The condition of the atmosphere at a specific place and time, including temperature, wind, clouds, and precipitation.
• Temperature: A measure of how hot or cold the air is.
• Precipitation: Water that falls from clouds as rain, snow, sleet, or hail.
• Wind: The movement of air caused by uneven heating of Earth's surface.
• Meteorologist: A scientist who studies weather and makes forecasts.
• Forecast: A prediction of what the weather will be like in the near future.
• Season: A time of year with predictable weather patterns.

Sources

• The Water Cycle | Precipitation Education. (n.d.). https://gpm.nasa.gov/education/water-cycle 
• What’s the difference between climate and weather? (n.d.). National Oceanic and Atmospheric Administration. https://www.noaa.gov/explainers/what-s-difference-between-climate-and-weather
• Ten basic clouds. (n.d.). National Oceanic and Atmospheric Administration. https://www.noaa.gov/jetstream/clouds/ten-basic-clouds
• Weather and Climate | Next generation Science Standards. (n.d.). https://www.nextgenscience.org/topic-arrangement/kweather-and-climate