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In this activity, learners add food coloring to hot and cold water in order to see how fluids at different temperatures move around in convection currents.

This activity helps learners understand how the angle of the Sun affects temperatures around the globe.

In this activity, learners discover how solar energy can be used to heat water.

In this activity, learners make a miniature greenhouse or "terrarium" to explore the greenhouse effect.

In this space science activity, learners explore transits and the conditions when a transit may be seen.

In this activity, learners make their own pinhole viewer in order to measure the size of the sun.

In this sunny day, outdoor activity, learners observe changes in shadows over time. The activity also helps to develop a sense of the Earth's motion.

In this activity, learners observe colors in the flame of a burning candle to explore connections between matter, light, color and temperature -- basic concepts of matter and energy.