# NASA Wavelength Resources Collection

## Density: Sea Water Mixing and Sinking

These two hands-on labs are about the role of temperature and salinity in governing the density of seawater, a major factor controlling the ocean's vertical movements and layered circulation.

## Astro101 Slide Set: "Inside-Out" Star Clusters

This slide set focuses on the discovery that some infant stars on the edges of star clusters are older than similar stars in the centers, a finding of NASA's Chandra and Spitzer missions.

## Technology Teacher: Keeping Nine Eyes on the Weather

This article discusses how the Multi-angle Imaging SpectroRadiometer (MISR) instrument found on the Terra satellite is used to understand how particles in the atmosphere interact with sunlight and how particle pollution affects Earth's climate.

## What's the Matter?

In this lesson, students will explore the density of substances as a model for understanding the mass to light ratio as a predictor of dark matter. They will measure and calculate mass and volume to calculate the density of a foam ball.

## How Far? How Powerful?

Gamma-ray bursts are distant explosions that briefly outshine the rest of the gamma-ray universe. In this lesson, students will follow the same procedures used by today's astronomers to determine two basic facts about gamma-ray bursts: their distance from Earth and their power.

## Postcards from Space

This is an activity about boundaries. Participants will imagine they have taken a journey from Earth through the Solar System out into the Milky Way Galaxy.

## Grandpa's Social Security

This simple example shows how algebra can be useful in the real world by exploring the question: Should Grandpa start receiving his Social Security benefits at age 62 or should he wait until age 65?

## Using Mathematical Models to Investigate Planetary Habitability: Activity C The Role of Actual Data in Mathematical Models

Students explore how mathematical descriptions of the physical environment can be fine-tuned through testing using data. In this activity, student teams obtain satellite data measuring the Earth's albedo, and then input this data into a spreadsheet-based radiation balance model, GEEBITT.

## The Great Planet Adventures Planetarium Show

Developed as a planetarium show, this video describes the unique environment of our solar system planets and a few satellites, along with some of the challenges and possible solutions for potential human habitation on each.

## The Mathematical Implications of Lying

This article explores how statistics can be interpreted in different ways to yield different conclusions. It describes the outcome and discussion of two class activities.