Microplastic pollution in the ocean is largely derived from the washing of synthetic clothes.

Primary Productivity is the rate at which organisms store energy through the formation of organic matter from inorganic carbon.

Waves in wave trains die out at the front and spawn in the back.

Water-water waves are not present in the oceans.

Diurnal tides typically occur in shallow seas.

A Crescent Moon is brighter than a Gibbous Moon.

Wave height is equal to twice the still water level.

Tsunami waves do not occur in wave trains.

The 'nadir' and 'zenith' are the points on Earth closest and furthest from the Moon, respectively.

The perihelion and aphelion describe points on the orbit of Earth around the Sun.