Day and night Student activity Play

Equivalence principle Whiteboard exercise Play

Equivalence principle Student activity Play

Geostationary satellite Animation Play

Meiosis Student activity Play

Meiosis – metaphase I Animation Play

Mitosis Student activity Play

Mitosis – metaphase Animation Play

Plain facts Animation Play

Satellite television Student activity Play

Satellite television Whiteboard exercise Play

The apparent movement of the Sun Student activity Play

The circle's circumference and its diameter Student activity Play

The diameter of the Earth Whiteboard exercise Play

The direction of the Earth's rotation Whiteboard exercise Play

The Earth in the Universe Student activity Play

The Sun's apparent movement Animation Play