9. Water comes from the soil, absorbed by the plant's roots.
10. Water enters the plant through its roots.
11. Sources of CO₂: animal respiration, decomposition of organic matter, and burning of fossil fuels.
12. The plant uses light energy (from the sun) to convert CO₂ and H₂O into sugar.
13. Glucose and oxygen are produced in photosynthesis.
14. Glucose is used by the plant for energy and growth; it is also consumed by humans and animals as food.
15. Oxygen is released into the air and used by living organisms for respiration.
16. [Student answer will vary] For example: Pictures are easier because they visually show the inputs and outputs, making the process intuitive. Words clarify the steps clearly, while symbols provide a precise chemical representation. Each format helps different types of learners.
Essential Question: Plants turn sunlight into energy through photosynthesis, a process that converts light energy into chemical energy stored in glucose. The chemical equation is: 6CO₂ + 6H₂O + sunlight → C₆H₁₂O₆ + 6O₂. Reactants are carbon dioxide (CO₂) and water (H₂O), which enter the plant via stomata and roots, respectively. Products are glucose (C₆H₁₂O₆), used for energy and growth, and oxygen (O₂), released into the atmosphere. This transformation occurs in chloroplasts using chlorophyll to capture sunlight.
Parent Tip: Review the logic above to help your child master the concept of photosynthesis worksheet 7th grade.
