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In this quick activity about size and scale (on page 2 of the PDF under What's Nano?

In this online interactive challenge, learners choose items to represent the Earth or solar system, then determine other items to represent the Moon, or Milky Way based on their relative size.

In this activity on page 1 of the PDF, learners compare the relative sizes of biological objects (like DNA and bacteria) that can't be seen by the naked eye.

Learners color and cut out a spiral-shaped snake. When they hang their snake over a radiator, the snake spins.