Presentation on theme: "An Introduction to Photosynthesis. BENCHMARKS: OBJECTIVES: I will state the overall equation of photosynthesis. I will explain how photosynthesis."— Presentation transcript:
An Introduction to Photosynthesis
BENCHMARKS: OBJECTIVES: I will state the overall equation of photosynthesis. I will explain how photosynthesis and cellular respiration are part of an interrelated cycle. I will describe the factors that affect photosynthesis. SC.912.L.14.7* SC.912.L.18.7-Identify the reactants, products, and basic functions of photosynthesis. SC.912.L.18.9*- Explain the interrelated nature of photosynthesis and cellular respiration.
REVIEW Plants, algae, and some bacteria are able to use light energy from the sun to produce food. They are called photosynthetic autotrophs. Animals, fungi, protozoa, and some bacteria obtain their energy from the food they consume. They are called heterotrophs. What are autotrophs and heterotrophs?
Take Notes Comes from the Greek words: photo - light synthesis - putting together Therefore, it means “using light to put something together” During photosynthesis, plants use the energy from sunlight to convert water and carbon dioxide into carbohydrates and oxygen. The energy is now STORED in the carbohydrate molecule. 6CO2 + 6H2O+ light C 6 H12O 6 + 6O2 What is photosynthesis?
Take Notes How are photosynthesis and cellular respiration related?
Take Notes Plants gather the sun’s energy with light absorbing molecules called pigments. Chlorophyll Carotene When chlorophyll absorbs light, much of the energy is transferred directly to electrons in the chlorophyll molecule. These high-energy electrons make photosynthesis work. Why are light and pigments needed for photosynthesis?
Complete the Gizmo DO NOW in your Gizmo Packet.
Guided Gizmo Warm-Up Independent Activity A and B
Exit Slip 1.The overall process of photosynthesis can be represented using a chemical equation. Like all chemical equations, the equation for photosynthesis must obey the law of conservation of mass. Which of the following is the correct and balanced equation for photosynthesis? A.CO 2 + H 2 O C 6 H 12 O 6 + O 2 B.6CO 2 + H 2 O C 6 H 12 O 6 + O 2 C.CO 2 + 6H 2 O C 6 H 12 O 6 + 6O 2 D.6CO 2 + 6H 2 O C 6 H 12 O 6 + 6O 2 What do we know?
Exit Slip 2. Which of these statements correctly describes the process of photosynthesis? A. Photosynthesis is an exothermic process because it releases energy. B. Photosynthesis is an endothermic process because it releases energy. C. Photosynthesis is an endothermic process because it requires the absorption of energy. D. Photosynthesis is an exothermic process because it requires the absorption of energy. What do we know?
Exit Slip 3. Which of these best describes the conversion of sunlight into the energy in glucose? A. Chemical energy is converted to kinetic energy. B. Kinetic energy is converted to potential energy. C. Electromagnetic energy is converted to chemical energy. D. Potential energy is converted to electromagnetic energy. What do we know?
ALOE VERACOLEUSPOTHOSSPIDER PLANT AMOUNT OF CO2 ABSORBED 180 mL168 mL164 mL175 mL AMOUNT OF O2 RELEASED 150 mL Scientists are measuring the rate at which carbon dioxide (CO2) and water are converted to glucose and oxygen (O2) per hour in various types of houseplants with the same biomass. The houseplants are all exposed to the same amount of sunlight and to the same conditions. The data they collect is given in the table. Exit Slip
What do we know? 4.What is the most likely reason that the plants absorb different amounts of CO2? A.The plants are different heights. B.The plants have different masses. C.The plants have different size leaves. D.The plants are different shades of green. Exit Slip ALOE VERACOLEUSPOTHOSSPIDER PLANT AMOUNT OF CO2 ABSORBED 180 mL168 mL164 mL175 mL AMOUNT OF O2 RELEASED 150 mL
What do we know? 5.In which process do these plants absorb CO2, water, and sunlight to produce glucose and O2? A.mitosis B.photosynthesis C.replication D.respiration Exit Slip ALOE VERACOLEUSPOTHOSSPIDER PLANT AMOUNT OF CO2 ABSORBED 180 mL168 mL164 mL175 mL AMOUNT OF O2 RELEASED 150 mL