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In this game, learners create flash cards with an image on one side (of an animal, for example) and the sound that animal makes on the other.

In this activity, learners create models of erosion and floods and learn to recognize both in their environment.

In this laboratory activity, learners use a simple procedure to bait oomycetes from water and/ or soil and then examine these fungus-like organisms with the microscope to see how they look.

In this activity, learners turn empty 2-liter bottles into a see-through compost container.

In this activity, learners will pretend to be archaeologist using this chilling experience.

In this 7-10 day investigation, learners develop an understanding of waves and tides and their motion through discussion, demonstration, and hands-on activities.

In this activity, learners observe a quick phase change as water rapidly goes from a liquid state to a solid state.

In this investigation, learners plant seeds in a 2-liter bottle filled with soil that is connected to a water source below. Over the next few weeks, learners observe how the plants grow.

Historically, sea floor mapping (bathymetry) was done by soundings.

In this activity, learners use sand and ice cubes to create a model of permafrost and the effects of the ice melting through the surface.

Using recycled materials, learners will design a transportation vehicle to carry an egg in an egg toss (a rudimentary model of a shock absorbent transport vessel).

Learners make kimchee or sauerkraut, which is really just fermented cabbage, in a 2-liter plastic bottle.

In this activity, learners build a model of a self-sustaining habitat (growing grass and beans from seeds).

In this activity, learners take on the role of various parts of the cell in order to model the process of protein synthesis.

In this hands-on nature activity, learners observe the emergence of leaves and flowers. Branches from trees and bushes are collected in the early spring, brought indoors, and placed in water.

A group of learners simulates the spread of disease by trading slips of paper, one set of which has been treated with a baking soda solution.