The purpose of this resource is to measure the salinity of the water using a salinity titration kit. Students will measure the salinity of saltwater using a salinity titration kit. Full description.

The purpose of this resource is to measure the bulk density of each horizon in a soil profile. In the field, students collect three soil samples from each horizon in a soil profile using a container with a measured volume. In the classroom, students weigh the samples, dry them, and weigh them again to determine their dry mass and water content. Students then sieve the dry soil samples and measure ... Full description.

The purpose of this resource is to measure the soil particle density of each horizon in a soil profile. Students weigh a sample of dry, sieved soil from a horizon, mix it with distilled water and then boil the mixture to remove any air. The mixture cools for a day and then students add water until the volume of the mixture is 100 mL. Students measure the temperature and mass of the final mixture and ... Full description.

The purpose of this resource is to explore what pigments exist in leaves and their importance. Students will conduct an experiment using paper chromatography to separate pigments present in leaves. Full description.

The purpose of this resource is to help students understand that some substances can be identified safely with your senses. Students will investigate how they use their senses for observation and why we use instruments to collect data. Full description.

The purpose of this activity is to measure the total precipitable water vapor (column water vapor) in the atmosphere above an observer's site. Students point a GLOBE/GIFTS water vapor instrument at the sun and record the voltage readings from a digital voltmeter. They observe sky conditions near the Sun and perform the Cloud Protocols. Intended outcomes are that students understand the concept that ... Full description.

The MYPond project is an investigation of the chemical reactions, biological processes and inflow/outflow balances found within a pond environment. Instrumentation has been established in two ponds near each other so that a variety of chemical and physical properties are measured at various depths at 15-minute time intervals. Data can be viewed either in real-time or accessed from an archive, and ... Full description.

This module engages students in the use of a clean room and in the planning of assembly of solar collector wafers for the Genesis space mission. They will work in production design teams to explore how the Genesis spacecraft will collect bulk solar wind with the collector arrays and learn to work as a team in a restrictive environment. The module includes several activities with accompanying video ... Full description.

The purpose of this activity is to observe, document, and classify changes in visibility and sky color over time and to understand the relationship between sky color, visibility, and aerosols in the atmosphere. The intended outcome is that students become aware of the changes in visibility and sky color due to particles suspended in the air. Full description.

The purpose of this resource is to model a soil's water storage over a year. Students will model the changes in soil water storage over a year. Full description.