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Learners build a filter from old soda bottles and dirt. They create polluted water, and pour it through their filter to clean it.

In this activity, learners confront their perceptions of gravity in the solar system.

Learners complete a series of hands-on and investigative activities to explore cumulus clouds.

Learners investigate a pre-constructed mystery tube to determine its interior mechanism.

In this chemistry meets cooking activity, learners compare the stability of egg white foams with various additives.

In this chemistry activity, learners explore whether matter is created or destroyed during a chemical reaction. They will compare the weight of various solutions before and after they are mixed.

In this creative activity, learners will practice looking carefully to observe details and to become familiar with dioramas as a method for displaying naturalistic scenes.

In this challenge, learners figure out how to make a juice stain disappear.

In this activity (page 4), learners work in groups to plan and build large structures using recyclable materials they have brought from home.

In this activity, learners use a laser pointer to project a microscopic image of a liquid sample suspended from the tip of a syringe.

In this activity, learners survey living organisms near where they live or go to school, and create a local field guide.

In this outdoor, winter activity, learners find living green plants under the snow and determine the light and temperature conditions around the plants.