 Key Concepts:  Where do marine organisms get the energy they need to survive?  Vocabulary:  Autotroph (Photo/Chemoautotroph)  Heterotroph  Photosynthesis  Respiration  Biomass

Life’s ultimate reaction

The definition: A process in which light energy, water and carbon dioxide are used to create glucose for energy. Photo= lightSynthesis= to make Specific for: algae, protista, aquatic plants and some bacteria

The Chemical Equation 6 CO 2 6 H 2 O C 6 H 12 O 6 6 O 2 light energy Carbon dioxide + water Name: ______________________________________ Date: _____________________ #______ + glucose + oxygen

 Photosynthesis takes place in the chloroplasts. Only the cells of the leaf and aquatic producers have chloroplasts.  In eukaryotic cells, the chloroplasts contain specialized light-absorbing pigments. Chloroplast

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9  Double membrane organelle  Outer membrane smooth  Inner membrane forms stacks of connected sacs called thylakoids  Thylakoid stack is called the granun (grana-plural)  Gel-like material around grana called stroma

 Chlorophyll A (green) is the most important photosynthetic pigment.  Other pigments called antenna or accessory pigments are also present in the leaf.  Chlorophyll B (also green)  Carotenoids (orange / red)  Xanthophylls (yellow / brown)

Chlorophyll absorbs most of the energy for the plant. There are two categories of chlorophyll: Chlorophyll a and Chlorophyll b. Recall the electromagnetic spectrum. Visible light ranges from wavelengths of 400 nm to ~750 nm. Which wavelengths- or colors- of light does chlorophyll mostly absorb?

Sunlight- the amount of sunlight available and the color of the light (plants do not use green light- they reflect it). Temperature- As temperature increases, photosynthesis will increase but only up to a certain point (higher temperature mean higher rate of transpiration [water loss]). Availability of water and carbon dioxide.

 Process of using chemical to create organic compounds.  Marine life forms - hydrothermal vents.  Specific for - APHOTIC zone.

Energy flow occurs through the marine ecosystems. The products of photosynthesis are the chemical ingredients for cellular respiration, while the products of cellular respiration are the chemical ingredients for photosynthesis.

Relationship of Cellular Respiration to Breathing Cellular respiration is an aerobic process, meaning that it requires oxygen Breathing supports cellular respiration by providing the body with oxygen and removing carbon dioxide.

Overall Equation for Cellular Respiration In cellular respiration, the atoms in glucose and oxygen are rearranged, forming carbon dioxide and water. The cell uses the energy released to produce ATP.

Cellular respiration breaks down organic molecules to yield energy. Energy stored in organic compounds is released in a series of enzymes controlled reactions. Similar to burning but…

 1. Title: Exploring the Rate of Photosynthesis  2. Objectives:  Examine the rate of photosynthesis.  Count the bubbles of oxygen produced in 15 min.  3. Hypothesis - what do you think that is happening if you expose a green algae to a light source?

 Explain photosynthesis and include the chemical equation  Describe your experiment and draw a picture of your experiment.

TimeBubbles of oxygen 5 min 10 min 15 min

 Summarize your overall findings and discuss experimental errors or problems you encountered.

Warm up Define photosynthesis and write the chemical equation for photosynthesis.