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Many people get water from a source deep underground, called groundwater.

In this activity, learners explore how engineering has developed various means to remove impurities from water.

An estuary is a body of water that is created when freshwater from rivers and streams flows into the saltwater of an ocean.

In this ecology activity (page 8 of the PDF), learners explore how to filter contaminated water using a variety of materials.

This is an activity/demo in which learners are exposed to the difference bewteen hydrophobic surfaces (water repelling) and hydrophilic surfaces (water loving).

In this activity, learners explore how water behaves differently when it comes in contact with "nano sand" and regular sand.

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

Learners follow directions to construct a water-powered electrical generator using a turbine made from plastic spoons.

In this activity, learners create a colorful bookmark using a super thin layer of nail polish on water. Learners discover that a thin film creates iridescent, rainbow colors.

In this design challenge activity, learners design and build a solar hot water heater. Their goal is to create a heater that yields the highest temperature change.

In this activity, learners are asked to examine the differences between two materials in a pair.

Bones are stiff, which helps us lift heavy things and walk around, but they are also somewhat flexible, which lets them bend slightly.

In the wild, small crustaceans known as brine shrimp live in marine habitats such as saltwater lakes.