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This lesson focuses on how materials behave differently as their surface area increases.

Learners observe a model of a cell and its chromosomal DNA made from a plastic egg and dental floss. Use this model to illustrate how much DNA is held in one cell.

In this activity, learners investigate the formation of craters. Learners will examine how the size, angle and speed of a meteorite's impact affects the properties of craters.

This fun hands-on astronomy activity lets learners use star maps (included) to find constellations and to identify stars with extrasolar planets (Northern Hemisphere only, naked eye).

In this fun hands-on activity learners explore a simple machine: the lever. What happens to a load when you multiply the length of a lever? Find out here!

In this activity, learners will use Google Sky to observe features of the night sky and share their observations.

In this activity, learners explore the different salinities of various sources of water by taste-testing.

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

Did you know that you would be a different age if you lived on Mars? It's true!

In this activity, learners will estimate the sizes of balls to learn how to estimate the size of hail. Learners will compare their estimates to the estimates of their peers and the real measurements.

In this activity, learners use a flexible magnet as a model for a scanning probe microscope (SPM). They learn that SPMs are an example of a special tool that scientists use to work on the nanoscale.

In this outdoor biology and math activity, learners estimate the size of a population of organisms too numerous to count.

In this activity, learners confront their perceptions of gravity in the solar system.

This is an activity (located on page 4 of the PDF under Surface Area Activity) about surface area and reactivity.

In this nutrition activity, learners explore food labels and consider the nutritional value of foods. Learners also explore units of measurement commonly used on food labels.

In this activity, learners investigate Scanning Probe Microscopes (SPM) and then work in teams using a pencil to explore and identify the shape of objects they cannot see, just as SPMs do at the nano

In this activity, learners explore how nanosized structures can create brilliant color.

In this activity, learners model the gravitational fields of planets on a flexible surface.

In this activity, learners use their imaginations and picture a scene in their heads.

In this demonstration, learners compare the relative sizes and masses of scale models of the planets as represented by fruits and other foods.