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In this activity, learners smell bottles containing bee pheromone molecules (or herb/spice extracts as a substitute). Bees release these molecules to send messages to each other.

Learners smell balloons filled with different scents to guess what's inside. From this, they infer the presence and motion of scented molecules.

Young learners investigate and observe the properties of three liquids -- water, vegetable oil, and corn syrup. They use their senses to collect data and ask and answer questions.

This is an activity (located on page 4 of the PDF under What's Nano? Activity) about size and scale.

In this four-part activity, learners explore how the body works and the chemistry that happens inside living things.

In this activity, learners use household materials to investigate and explore their ability to smell an odor.