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In this activity, learners observe live fish in tanks to consider how their body structures are related to their behaviors and habitats.

This activity has learners interacting with live crayfish, but could be adapted for a variety of similar hardy and interesting organisms.

In this activity, learners cut out and assemble wheels to explore how variations in fish body structures (mouth shape/position/teeth, body shape, tail shape, and coloration patterns) allow fish to sur

In this activity, learners look at and touch marine animal skulls to compare them and think about what they eat.

In this outdoor, beach activity, learners use tennis balls, water balloons and other simple devices to investigate the movement of waves and currents off a sandy beach.

In this activity, learners observe mixtures of sand samples glued to note cards, and consider how sand can differ in size, shape, and color, and where it comes from.

This is a guide for facilitating interaction at a touch tank with marine animals. The instructions are for setting up a display in an informal science center, but could work anywhere.

Where rainwater goes after the rain stops? And why there are rivers and lakes in some parts of the land but not in others?

Water on Earth is in lakes, the ocean, rivers, underground, and frozen glaciers.

In this activity, learners explore a bucket of sand and beach objects.