Compare photosynthesis (how plants make food) and respiration (how living things release energy from food).
Photosynthesis: carbon dioxide + water + sunlight → glucose + oxygen. It occurs in chloroplasts and produces food and oxygen.
Write the word equation for photosynthesis.
Carbon dioxide + Water + Sunlight → Glucose + Oxygen
Where in the plant cell does photosynthesis occur?
In the chloroplasts
Why does photosynthesis only happen in daylight (or under artificial light)?
Because it requires light energy to convert carbon dioxide and water into glucose and oxygen
Respiration: glucose + oxygen → carbon dioxide + water + energy. It occurs in all living cells, releasing energy for life processes.
Write the word equation for respiration.
Glucose + Oxygen → Carbon Dioxide + Water + Energy
How is respiration almost the reverse of photosynthesis?
Photosynthesis uses CO₂ and water to make glucose and oxygen, while respiration uses glucose and oxygen to release CO₂, water, and energy
Does respiration happen only at night, opposite to photosynthesis?
No, respiration happens continuously, both day and night, in all living cells
1. What are the raw materials needed for photosynthesis?
2. What are the products of photosynthesis?
3. What are the products of respiration?
4. Where does photosynthesis occur in a plant cell?
5. Do all living things carry out respiration?
6. What raw materials does photosynthesis require?
7. What products does photosynthesis create?
8. What products does respiration release?
9. Why is respiration necessary even though photosynthesis already produces food?
10. Do animals carry out photosynthesis?