1. Energy and Ecosystems SJCHS

2. Photosynthesis Photosynthesis: Carbon (C) in CO 2 made into glucose Occurs in plants

3. Why are plants green? Light can be transmitted, absorbed, reflected

4. Why are plants green? Light that is reflected is what we see (other colors absorbed)

5. Why are plants green? Pigment: Chemical that can absorb light or emit light Chlorophyll: pigment in plants Chlorophyll only reflects green light (absorbs other colors)

6. Chloroplasts Chloroplast: Where photosynthesis occurs in plant cells

7. Stomata Stomata: Pores in leaf; allow carbon dioxide, oxygen, and water in/out Can open/close

8. Photosynthesis Inputs Water: absorbed through the roots of a plant Carbon Dioxide: Comes in stomata Sunlight Outputs Oxygen: From breakdown of Water; Leaves via stomata Glucose: Stored or used by plant

9. Primary Productivity Production: Total biomass of light fixed by a plant (made into sugar) Depends on temperature, light, water, nutrients Primary Productivity: How much biomass is produced in a given area over a period of time Depends on leaf/plant area, growth rate, production Some ecosystems are more productive than others

10. Video

12. Photosynthesis Radish experiment: Dish 1 contained seedlings that germinated and grew with light and water (+light, +water). Dish 2 contained seedlings that germinated and grew in the dark with water available (-light, +water). Dish 3 contained seeds that had light but no water (+light, -water). The seeds were allowed to grow and then were dried

13. None of the seedlings in the different experimental conditions would increase in mass because there is no soil. a.Reasonable b.Not Reasonable c.Not Sure

14. If any of the seedlings increased in mass at the end of the experiment (compared with the initial mass of the seeds), it was mostly due to the water the plant was given. a.Reasonable b. Not Reasonable c. Not Sure

15. If any of the seedlings increased in mass at the end of the experiment (compared with the initial mass of the seeds), it was mostly due to molecules in the air that the plant took in. a.Reasonable b.Not Reasonable c.Not Sure

16. If any of the seedlings increased in mass at the end of the experiment (compared with the initial mass of the seeds), it was because light itself has mass. Plants use the mass in light to become heavier. a.Reasonable b. Not Reasonable c. Not Sure

17. If the seedlings are continually supplied with water and light, they will always continue to grow. a.Reasonable b. Not Reasonable c. Not Sure

19. None of the seedlings in the different experimental conditions would increase in mass because there is no soil. a.Reasonable b.Not Reasonable c.Not Sure

20. If any of the seedlings increased in mass at the end of the experiment (compared with the initial mass of the seeds), it was mostly due to the water the plant was given. a.Reasonable b. Not Reasonable c. Not Sure

21. If any of the seedlings increased in mass at the end of the experiment (compared with the initial mass of the seeds), it was mostly due to molecules in the air that the plant took in. a.Reasonable b.Not Reasonable c.Not Sure

22. If any of the seedlings increased in mass at the end of the experiment (compared with the initial mass of the seeds), it was because light itself has mass. Plants use the mass in light to become heavier. a.Reasonable b. Not Reasonable c. Not Sure

23. If the seedlings are continually supplied with water and light, they will always continue to grow. a.Reasonable b. Not Reasonable c. Not Sure

25. Cellular Respiration Cellular Respiration: Glucose broken down to make ATP Occurs in all organisms

26. Cellular Respiration Mitochondria: Where cellular respiration takes place in a cell

27. Cellular Respiration Inputs Glucose: Comes from food Oxygen: Inhaling Outputs Water: Used in organism ATP: Used for cellular work Carbon Dioxide: Exhaling

28. Ecosystem Products from cellular respiration help to power photosynthesis and vise versa