Question

1. describe the flow of energy through photosynthesis and cellular respiration.
2. use our model to provide evidence for what happens to the inputs of the system when light energy is absorbed.

inputs light outputs

1. some airplants have the ability to be planted in soil. write a hypothesis for an experiment where you are changing whether or not the plant is in soil will change the mass of the plant.
2. describe how light energy is needed in order for the reaction to occur.
3. based on the information in table 1, explain how the plant can use photosynthesis to increase its mass?

for the exceed:

1. mom accidentally moved the plant into the closet for five days. why is it still alive after five days even without sunlight? be sure to explain your answer using the information in the table below.

initial mass (before 5 days in closet) final mass (after 5 days)
60.2 g 57.7 g

Explanation:

1. In photosynthesis, light energy is absorbed by chlorophyll in plants. Carbon - dioxide and water are taken in as inputs. Through a series of reactions, glucose and oxygen are produced as outputs. In cellular respiration, glucose is broken down in the presence of oxygen to release energy in the form of ATP, with carbon - dioxide and water as by - products.
2. When light energy is absorbed, water is split (photolysis) to release oxygen and provide electrons and protons. These electrons and protons are used in the synthesis of ATP and NADPH which are then used to convert carbon - dioxide into glucose.
3. Hypothesis: If a plant is planted in soil, then its mass will be greater than if it is not planted in soil, because soil provides essential nutrients for plant growth.
4. Light energy is needed to excite electrons in chlorophyll. These excited electrons are used to generate ATP and NADPH which are energy - rich molecules required to drive the Calvin cycle, where carbon - dioxide is fixed to form glucose.
5. Plants use photosynthesis to increase their mass by taking in carbon - dioxide from the air and using the energy from light to convert it into glucose. Glucose can be used to build other organic molecules like cellulose, starch, and proteins, thus increasing the plant's mass.
6. The plant is still alive after five days without sunlight because it has some stored energy in the form of starch. During photosynthesis, plants store excess glucose as starch. The plant is using this stored starch for energy through cellular respiration. The decrease in mass (from 60.2 g to 57.7 g) is due to the breakdown of stored organic matter for energy.

Answer:

1. In photosynthesis, light energy is absorbed to convert carbon - dioxide and water into glucose and oxygen. In cellular respiration, glucose is broken down to release energy.
2. Absorbed light energy splits water and generates energy - carrying molecules for carbon - dioxide conversion.
3. If a plant is in soil, its mass will be greater due to nutrient availability.
4. Light energy excites electrons to generate ATP and NADPH for the Calvin cycle.
5. Plants convert carbon - dioxide into glucose during photosynthesis to build organic molecules and increase mass.
6. The plant uses stored starch through cellular respiration; the mass decrease is from using stored organic matter.