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II. Biology 1 (1570)

III.Biology 2 (1059)

III.Biology 3 (699)

IV.Biology (779)

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Resources: 1 – 25 Total: 34

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		[Whiteboard exercise] Absorption of ultraviolet radiation by ozone Play					[Animation] Breakdown of ozone molecules Play


		[Slideshow] Causes and prevention of global warming Play					[Simulation] Changes in the size of the ozone hole during the year Play


		[Whiteboard exercise] Chemical equation for ozone breakdown by chlorine Play					[Simulation] Effects of changing carbon dioxide concentrations in the Earth's atmosphere Play


		[Student activity] Global warming Play					[Whiteboard exercise] Global warming Play


		[Student activity] Global warming: potential effects Play					[Whiteboard exercise] Global warming: potential effects Play


		[Student activity] Global warming: probable causes and prevention Play					[Whiteboard exercise] Global warming: probable causes and prevention Play


		[Illustration] Greenhouse effect on Venus Play					[Slideshow] Harmful effects of UV radiation Play


		[Slideshow] Measures taken to prevent expansion of the ozone hole Play					[Slideshow] Other agents that increase the size of the ozone hole Play


		[Animation] Ozone Play					[Simulation] Ozone concentration and the absorption of UV radiation Play


		[Slideshow] Ozone hole Play					[Student activity] Ozone hole: effects Play


		[Whiteboard exercise] Ozone hole: effects Play					[Student activity] Ozone hole: measures to prevent expansion Play


		[Whiteboard exercise] Ozone hole: measures to prevent expansion Play					[Student activity] Ozone hole: probable causes Play


		[Whiteboard exercise] Ozone hole: probable causes Play

Resources: 1 – 25 Total: 34

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