In this Mystery, students analyze the advantages and disadvantages of different sources of energy, including burnable fuels and alternative (renewable) energies.

In this Mystery, students develop their thinking about the predator/prey relationships between living things.

In this Mystery, students investigate the hypothesis that an asteroid impact caused the extinction of the dinosaurs.

In this Mystery, students will be introduced to the Earth’s orbital movement around the Sun, as a means of seeing why the constellations change.

In this Mystery, students use estimation and graphing to discover the surprising difference in the amounts of fresh and salt water on Earth.