1. Chemosynthesis and Hydrothermal Vents

2. What is chemosynthesis?
Chemosynthesis is used when sunlight is not available.
What happens during chemosynthesis?
During chemosynthesis, organisms use inorganic substances in place of sunlight to make sugar and oxygen.
What is the equation for chemosynthesis?
Inorganic substances + water+ carbon dioxide
Oxygen + sugar

3. What organisms do chemosynthesis?
Organisms that do not receive sunlight HAVE to do chemosynthesis in order to make food for themselves (bacteria or deep water organisms).

4. Why does chemosynthesis happen?
Some ocean organisms live so far below the surface that they do not get any sunlight. They use chemosynthesis instead of photosynthesis.

5. Chemosynthesis Independent Research
Read the article from Discovery Education about tube worms.
Answer the following questions:
Where do tubeworms live?
Explain how a tubeworm looks.
What is a “symbiotic” relationship?
Explain the relationship between tubeworms and the bacteria that lives inside of them.
Through what process do tubeworms make oxygen and sugar?
Why can’t tubeworms do photosynthesis?
What is the equation for chemosynthesis?
What is the difference between chemosynthesis and photosynthesis?

6. #1. Some types of bacteria live deep in the ocean where sunlight cannot reach. These bacteria use the energy stored in inorganic molecules to make sugars (HSA 2007).
Which of these processes do the bacteria use to produce sugars?
photosynthesis
chemosynthesis
aerobic respiration
nitrogen fixation

7. #2. Some bacteria live in habitats without light
#2. Some bacteria live in habitats without light. They produce their own food using inorganic substances from the environment.
Which of these terms best describes this process?
photosynthesis
cellular respiration
binary fission
chemosynthesis

8. #3. In deep ocean trenches, bacteria produce organic materials from inorganic compounds through the process of
respiration
decomposition
photosynthesis
chemosynthesis