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View Resource NASA Earth Observatory images

The purpose of NASA's Earth Observatory is to provide a freely-accessible publication on the Internet where the public can obtain new satellite imagery and scientific information about our home...

View Resource Observing and Quantifying Predator-avoidance Behavior: Habitat Shifts by Snails in Response to Predator Cues

In this activity, students conduct an experiment to test a hypothesis about how freshwater snails detect and avoid fish predators using chemical cues and habitat complexity. Students generate a...

View Resource The Insect Predation Game: Evolving Prey Defenses and Predator Responses

In this activity, learn about predator-prey interactions by pretending to be generalist insect predators foraging for three prey species (candy). Three feeding adaptations are used (mandibles,...

View Resource Mud manifests history of clear water in murky Minnesota duck depot Lake Christina: Press Release

This press release described the findings of a study of the impacts of human activities on a lake in western Minnesota. The study will be published as part of a 200-year Perspective on Alternative...

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View Resource Investigating human impact on stream ecology: locally and nationally

This activity is intended for students to lead investigations on stream ecology. Students will exercise critical thinking skills to interpret data sets and maps regarding water quality and usage. ...

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