The force exerted on the surface by the column of air above it is called atmospheric pressure or air pressure. It is measured by means of an instrument called barometer.
The zebrafish is a freshwater fish belonging to the minnow family. It is native to South Asia, it is a popular aquarium fish, frequently sold under the trade name zebra danio. It belongs to India and Sri Lanka.
The Mackenzie Delta is formed on the Mackenzie river which is the longest river system in Canada. The delta is a home to vast regions of Boreal forests.