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Differing Densities: Fresh and Salt Water
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In this activity, learners visualize the differences in water density and relate this to the potential consequences of increased glacial melting.

Changing the Density of a Liquid: Heating and Cooling
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Learners investigate how the temperature of water affects its density.

Saguaro Nest Cavities
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This activity (on page 3 of the PDF under GPS: Cactus Activity) is a full inquiry investigation into how some desert birds keep their cool.

Temperature Affects Dissolving
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Learners design their own experiment to compare how well cocoa mix dissolves in cold and hot water. They will see that cocoa mix dissolves much better in hot water. Adult supervision recommended.

Turning the Air Upside Down: Warm Air is Less Dense than Cool Air
Learners cover a bottle with a balloon. When they immerse the bottle in warm water, the balloon inflates. When they immerse the bottle in a bowl of ice, the balloon deflates.

Lift Off!
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This activity (on page 2 of the PDF under SciGirls Activity: Lift Off) is a full inquiry investigation into the engineering challenges of sending scientific sensors into space.

Moldy Jell-O
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In this laboratory activity, learners design an experiment to evaluate how environmental factors influence the growth of molds.

Conduction Countdown
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In this quick SciGirls activity (page 1 of the PDF under SciGirls Activity: Doghouse Design), learners will be introduced to the concept of thermal conductivity.

Physical Change
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In this activity, learners use heat to separate zinc and copper in a penny. This experiment demonstrates physical properties and how physical change (phase change) can be used to separate matter.

Canned Heat
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In this activity, learners explore how light and dark colored objects absorb the Sun's radiations at different rates.

Chocolate (Sea Floor) Lava
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In this edible experiment, learners pour "Magic Shell" chocolate into a glass of cold water. They'll observe as pillow shaped structures form, which resemble lavas on the sea floor.

Sinking Water
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In this experiment, learners float colored ice cubes in hot and cold water.

Gas Model
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This highly visual model demonstrates the atomic theory of matter which states that a gas is made up of tiny particles of atoms that are in constant motion, smashing into each other.

The Daily Ups and Downs
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In this activity, learners graph 48 hourly air temperatures from a local weather observation site and observe the diurnal temperature variations.

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

Temperature vs. Height: Soda Geyser Series #6
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In this activity, learners conduct a controlled experiment to examine how temperature will affect the height of a soda geyser.

Temperature Tactics
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In this activity, learners explore the devices used over time to measure changes in temperature.

Colors of Stars
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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.

Ice Cream Shake
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In this tasty activity, learners make their own ice cream any day of the year in an exploration of heat and cold. Highlights include freezing and melting and the transition from liquid to solid.

Wonderful Weather
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In this activity, learners conduct three experiments to examine temperature, the different stages of the water cycle, and how convection creates wind.