Ontario Grade 9 Science Class Practice Exam

What process do plants and some other organisms use to convert water and carbon dioxide into oxygen and sugars?

1. Respiration

2. Fermentation

3. Photosynthesis

4. Osmosis

The correct answer is: Photosynthesis

Photosynthesis is the process by which plants and some other organisms use energy from sunlight to convert water and carbon dioxide into oxygen and sugars. Respiration is the process of converting oxygen and sugars into energy. Fermentation is a process that occurs in the absence of oxygen, and involves converting sugars into energy. Osmosis is the movement of water molecules across a semipermeable membrane. Therefore, the correct answer is C, as it specifically mentions the conversion of water and carbon dioxide into oxygen and sugars.