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This short online lesson discusses the planet Neptune.

This short online lesson discusses the planet Saturn

This short online lesson discusses the planet Uranus.

This short online lesson discusses the planet Venus.

This online activity is a math game on rounding numbers. 

This is an online activity that provides you with various exercises on rounding whole numbers.

Even though molecules, proteins, viruses, and cells are all tiny, there are significant size differences between them. The diameter of a water molecule is roughly 0.28 nanometers. The diameter of the protein hemoglobin is roughly 5 nanometers. The diameter of the HIV virus is roughly 120 nanometers. A red blood cell is 6-8 micrometers.

This YouTube video explores both passive and active solar energy.

This short YouTube video introduces you to the planets which make up the solar system.

This online resource introduces the geocentric and heliocentric models. Exoplants, planets and their motions, planetary orbits, the role of gravity and how the solar system was formed are also covered.