Neptune's weather is characterised by extremely dynamic storm systems, with winds reaching speeds of almost 1400 mph--nearly attaining supersonic flow.

Porosity is the percentage of void space in a rock or the space between the grains.

Glucose is not an ionic substance.

Shale is a fine-grained sedimentary rock that forms from the compaction of silt and clay-size mineral particles that we commonly call "mud." This composition places shale in a category of sedimentary rocks known as "mudstones."

The biosphere is the global sum of all ecosystems on Earth.

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.

The mass of Jupiter is about 2.5 that of all the other planets in the Solar System combined.

Venus has the longest rotation period (243 Earth days) of any planet in the Solar System. It orbits the Sun every 224.65 Earth days. So one Venus day is nearly 20 Earth days longer than its year.

The Copernican model departed from the Ptolemaic system that prevailed in Western culture for centuries, placing Earth at the center of the Universe, and is often regarded as the launching point to modern astronomy and the Scientific Revolution.

It takes 247.9 Earth years for Pluto to make one orbit around the Sun.