Certify Teacher Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

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In the process of photosynthesis, how are physical and chemical changes represented?

The leaves grow, indicating a physical change, while glucose formation represents a chemical change.

The roots absorb water, signifying a chemical change, while leaf growth represents a physical change.

The size of the leaves alters due to sunlight absorption as chemical energy is converted into physical growth.

The leaves grow in size, which is a physical change, and the process rearranges water and carbon dioxide atoms, indicating a chemical change.

In photosynthesis, the process involves both physical and chemical changes. The growth of leaves represents a physical change, as it involves an increase in size and biomass due to the accumulation of materials. This growth is a visible indicator of the plant's development and is not associated with alterations in the chemical structure of the substances involved.

On the other hand, the rearrangement of atoms from water and carbon dioxide to form glucose and oxygen represents a chemical change. This transformation alters the chemical composition of the reactants, resulting in new substances being created through the process of photosynthesis. The chemical bonds between the atoms are broken and formed, leading to the synthesis of glucose, which is crucial for the plant's energy needs.

This answer accurately captures the dual nature of photosynthesis by highlighting the physical growth of the plant and the chemical processes that convert light energy into stored chemical energy in the form of glucose.

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