Which gas is released during photosynthesis?

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Prepare for the Virginia 7th Grade Science SOL Test. Incorporate flashcards and multiple choice questions, each with hints and detailed explanations. Ensure your success on the exam!

Multiple Choice

Which gas is released during photosynthesis?

Explanation:
During photosynthesis, light energy drives the splitting of water in the chloroplasts. This step, part of the light-dependent reactions, releases oxygen gas as a byproduct that is then released into the atmosphere. In the overall process, carbon dioxide and water are used to make glucose, so carbon dioxide is a reactant and water is consumed, not released as a gas. Methane isn’t involved in photosynthesis. While plants can release water vapor through transpiration, the gas produced specifically by the photosynthetic reactions is oxygen.

During photosynthesis, light energy drives the splitting of water in the chloroplasts. This step, part of the light-dependent reactions, releases oxygen gas as a byproduct that is then released into the atmosphere. In the overall process, carbon dioxide and water are used to make glucose, so carbon dioxide is a reactant and water is consumed, not released as a gas. Methane isn’t involved in photosynthesis. While plants can release water vapor through transpiration, the gas produced specifically by the photosynthetic reactions is oxygen.

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