04.02 Photosynthesis
Which description properly describes the plant structures involved in photosynthesis?
Phloem transports glucose to the plant, and stomata release oxygen.
How are food and oxygen made during the process of photosynthesis?
Plants convert this energy from the sun to chemical energy that is stored in a sugar called glucose.
Describe the role of xylem in photosynthesis.
The xylem and phloem are like transportation tubes for water and food. The xylem move water and minerals from the roots, up through the stem, and out into the leaves. The phloem move the food (pretty much sugary water—or sap) through the plant.
chloroplasts
organelles that capture the energy from sunlight and convert it into chemical energy in a process called photosynthesis
What is photosynthesis, and what is its main goal?
photosynthesis demonstrates this law when it takes in light energy from the sun and converts it to chemical energy (food) for the plant.
What evidence supports a conservation law?
6 CO2 + 6 H2O + light → C6H12O6 + 6 O2
What is the chemical reaction for photosynthesis?
6H2O + 6CO2 --> C6H12O6 + 6O2
Describe the process of photosynthesis (including what components get released).
During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.
Ending Substances in photosynthesis
Glucose Oxygen
During photosynthesis, is light energy converted to chemical energy.
Light energy is converted to chemical energy when a photochemically excited special chlorophyll molecule of the photosynthetic reaction center loses an electron, undergoing an oxidation reaction.
What components are needed for photosynthesis?
Light, CO2, water, and Chlorophyll
carbon dioxide (CO2)
Plants need carbon dioxide (CO2) to perform photosynthesis. They use sunlight, water, and the element carbon (C) to make the food. This leaves the oxygen (O2) from the carbon dioxide on its own. The plants release the oxygen into the atmosphere. Animals need this oxygen to live.
Describe the role of stomata in photosynthesis.
Stomata are small openings in the lower epidermis. Think of the stomata as the leaf's sliding doors. Through these holes, carbon dioxide enters and oxygen and water vapor exit
What is chlorophyll and its role in photosynthesis?
The energy absorbed from light is transferred to two kinds of energy-storing molecules.
An example of the Law of Conservation of Energy is
The law of conservation of energy states that energy can be neither created nor destroyed, but it can transform from one form to another.
Beginning Substances in photosynthesis
Water Sunlight Carbon dioxide Chlorophyll
What happens to water (H2O) during photosynthesis?
Water (H2O) is a key component of photosynthesis. It is combined with sunlight and carbon dioxide to make glucose and oxygen during photosynthesis.
an example of the law of conservation of mass.
matter can change forms, but its mass will always stay the same. Converts to new matter
phloem
the vascular tissue in plants that conducts sugars and other metabolic products downward from the leaves.
How do living systems follow the laws of conservation of mass and energy?
when animals die and decompose, the elements that made their bodies become part of the soil. These elements support the growth of new vegetation. In this way, the mass of the deceased animal is never lost, only converted to new matter.
