Snow and ice are both precipitation, that is, the processes that remove water from clouds. Clouds, regions of the atmosphere with high relative humidity, are made of droplets of water and perhaps bits of ice. Even though water is much denser than air, these droplets and ice crystals are small enough to be suspended by random upward air motion. When these droplets or crystals join together, gravity ... Full description.

In this lesson, students will play the role of a member of an International Team of Marine Biologists tasked with predicting and monitoring possible harmful algae blooms. They will evaluate changes in the ocean's chlorophyll counts from 1997-2007 using data sets from MyNASAData website, draw conclusions about how the chlorophyll-a levels in the ocean may effect its ecological characteristics and infer ... Full description.

Researchers such as paleoclimatologists or dendrochronologists use tree ring analyses as one tool to reconstruct climate information about the past. They will often reference data from other sources such as historical weather records, and ice core or ocean core samples to support their findings. In this lesson students will utilize monthly average precipitation data to strengthen conclusions about ... Full description.

In this lesson, students will use NASA satellite measurements of atmospheric pressure to learn that pressure decreases with height in the atmosphere. Full description.

Solar radiation (light) strikes Earth's surface throughout the daylight hours. Radiation (heat or infrared) also leaves the Earth during daylight and at night. Averaged over time and space, these downward and upward energy fluxes are equal. If they were not, our planet would gradually heat up or gradually cool down. But the surface of our planet is not simply a mirror for radiation. Some of the incoming ... Full description.

Climate is the long-term weather conditions for a region, generally determined by 30 or more years of records. Climate zones can be defined using parameters such as temperature and rainfall. In this lesson, students will make climatic diagrams called climographs which will relate weather and climate for a particular location. Monthly average values of weather data such as temperature and precipitation ... Full description.

In developing models for climate change and weather prediction, the measurements of surface and near-surface temperature are an important factor in the modeling process. As the Sun heats the Earth's surface, the atmosphere is warmed from below by the processes of conduction and convection from the surface. However, near-surface air temperature (approximately 10 meters above the surface) is often different ... Full description.

The onset of winter in higher latitude regions of North America brings snow to the area around the Great Lakes. The amount of snow is dependent on many variables. One of the most significant factors determining snowfall amount in the Great Lakes drainage basin is the surface temperature of the lakes. In this lesson, students will extrapolate information from selected MY NASA DATA and NOAA websites ... Full description.

In this lesson, students will examine a historical Category 5 hurricane, Hurricane Rita, that crossed the Gulf of Mexico during September 18-24, 2005. First, they will use the MY NASA DATA Live Access Server to obtain sea surface temperature (SST) data maps of the Gulf of Mexico. Then, they will construct a time series of SST data (line plot) for a location within the path of the hurricane where a ... Full description.

Weather involves the daily fluctuations in temperature, humidity, clouds, winds, etc. By contrast, climate is the long term weather patterns in a region. Therefore, to assess changes in climate, one has to look at average changes over long periods of time. Students will use long wave radiation data to determine whether the climate has changed in Portland, Oregon over a 20 year time span. They will ... Full description.