Science Quiz / 'O' in Natural Sciences

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Answers to these Natural Sciences questions start with an 'O'

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Branch of physics which involves the behaviour and properties of light
Region of Earth's stratosphere that absorbs most of the Sun's UV radiation
Scientific study of phenomena found in the world's oceans
Constellation at the south celestial pole
Most arboreal of the great apes currently found in only Borneo and Sumatra
Animal that eats both animal and plant foods
Branch of zoology that deals with the study of birds
Isolated area of vegetation in a desert, typically surrounding a water source
U-shaped body of water formed when a meander from the main river is cut off
Difference between any two sounds whose frequencies make a 2:1 ratio
Process that causes a liquid to pass through the wall of a living cell
Process of swinging or moving to and fro in a steady, uninterrupted manner
Spherical cloud of small icy bodies believed to surround the Sun at up to 50,000 AU
Chemical compound where oxygen is combined with another element
Observation that lies outside the overall pattern of a distribution
An angle greater than 90 degrees and less than 180 degrees
Any living structure capable of growth and reproduction
Path of a celestial body as it moves through space
Point where the axes of a Cartesian coordinate system intersect
An integer of the form n=2k+1, where k is an integer

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