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The Earth's system exemplifies stability and change. Change and rates of change can be observed and quantified over very short or long periods of time and at various spatial scales (e.g., from landscape level to global processes).

The Earth's system exemplifies stability and change. Change and rates of change can be observed and quantified over very short or long periods of time and various spatial scales (e.g., from landscape level to global processes).

The Earth's system exemplifies stability and change. Change and rates of change can be observed and quantified over very short or long periods of time and at various spatial scales (e.g., from landscape level to global processes).

Snow cover and ice extent are monitored by satellite instruments measuring the reflectance of Earth's surface in various wavelengths every day. Snow and ice have a recognizable pattern of reflectance, so the satellite data can be processed to show where snow and ice are present. 

Purpose:  Consider using this mini-lesson during the last 10 minutes of the class period/lesson to assess students formative learning. 

In some parts of the world sea levels are increasing, while decreasing in others, and remain relatively flat in a few places; for more than 20 years, NASA has been tracking the global surface topography of the ocean to understand the important role it plays in our daily lives. 

Hiking up to Greenland’s ice sheet, the sun remains low on the horizon even during midday.

Reflections at the top of the world

An animation showing “sea level fingerprints,” or patterns of rising and falling sea levels across the globe in response to changes in Earth’s gravitational and rotational fields. Major changes in water mass can cause localized bumps and dips in gravity, sometimes with counterintuitive effects.

This series of videos highlights how NASA Climate Scientists use mathematics to solve everyday problems.  These educational videos to illustrate how math is used in satellite data analysis.