Transcript What is chemosynthesis? - Port Fest Baltimore 2015

Chemosynthesis and
Hydrothermal Vents
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
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).
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.
Chemosynthesis Independent Research
• Read the article from Discovery Education about tube worms.
• Answer the following questions:
1. Where do tubeworms live?
2. Explain how a tubeworm looks.
3. What is a “symbiotic” relationship?
4. Explain the relationship between tubeworms and the
bacteria that lives inside of them.
5. Through what process do tubeworms make oxygen and
sugar?
6. Why can’t tubeworms do photosynthesis?
7. What is the equation for chemosynthesis?
8. What is the difference between chemosynthesis and
photosynthesis?
#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?
A. photosynthesis
B. chemosynthesis
C. aerobic respiration
D. nitrogen fixation
#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?
A. photosynthesis
B. cellular respiration
C. binary fission
D. chemosynthesis
#3. In deep ocean trenches, bacteria
produce organic materials from
inorganic compounds through the
process of
A.
B.
C.
D.
respiration
decomposition
photosynthesis
chemosynthesis