1. 7th Grade FCAT 2.0 Review
Recycled Carbon

2. How is carbon recycled within an ecosystem?
Essential Question
How is carbon recycled within an ecosystem?

3. Engage:
Decide whether an organism uses the process of photosynthesis and/or respiration.
Write P for photosynthesis and R for respiration

4. Explore:
Read the carbon article. In this article, carbon is constantly recycled through the environment. Create a labeled diagram showing the path of carbon as it travels through the environment.

5. Explain: Describe the process used by plants that take in carbon.
Describe the process used by organisms that releases carbon.
How do human actions affect the carbon cycle?
photosynthesis
Respiration
Releasing carbon when burning fossil fuels

6. Elaborate:
Energy and matter are two factors present in every ecosystem.
Most of the energy that enters an ecosystem comes from the __________.
sun

7. Elaborate:
Some of this energy is converted into chemical energy that moves through an ecosystem.
The _______ in an ecosystem includes food, water and air.
This matter is constantly being changed in form and recycled through the environment.
matter

8. Elaborate:
______ is an important form of matter that cycles through an ecosystem.
This continual movement of carbon is known as the ___________.
Carbon
Carbon cycle

9. Elaborate:
There are several processes that important to the carbon cycle including ___________ and _____________.
photosynthesis
respiration

10. Elaborate:
Plants, algae and some bacteria use carbon dioxide, __________ and water for the process of photosynthesis.
These raw materials, known as reactants, are used by the ________ of cells to produce sugar and oxygen.
The ________ is stored as a source of energy, and the oxygen released back into the environment.
light
chloroplasts
sugar

11. Elaborate:
Most organisms, including plants, get energy out of food with a process known as respiration.
During respiration, sugar and _________ combine in the _________ to produce energy, water and ___________.
The energy is used by the organism and the water and carbon dioxide are __________ into the environment.
oxygen
mitochondria
Carbon dioxide
released

12. Elaborate
Because energy and matter are constantly flowing through an environment, we know that neither matter, nor energy is ___________.
They simply change form.
This is known as the _______________________
destroyed
Law of conservation of mass and energy

13. Evaluate:
Fill out the chart and answer the questions below based on the activity and reading.
Materials Needed
(Reactants)
Materials Formed
(Products)
Location in The Cell
Photosynthesis 1. 2. 3.
Respiration 4. 5. 6.
Sunlight
Water
Carbon dioxide
Sugar
oxygen
chloroplasts
Oxygen
sugar
Energy
Water
Carbon dioxide
mitochondria

14. Evaluate:
How do photosynthesis and respiration contribute to the carbon cycle?
Photosynthesis removes carbon from the air and respiration releases it back into the air