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March 11, 2013 Q-2 Pg.Daily Goal: We will be able to explain why we never run out of carbon.Homework: Complete your daily carbon cycle log (to be passed out this class period).
Science Starter: 1. Draw a picture of a flower and label the following parts:
stem, roots, leaves, petals, anther, stamen, pistil, ovary, stomata, guard cells.
2. List all the ways that you can think of that the flower would interact with its environment. Include biotic and abiotic factors, and processes. You should be able to think of at least 8.
The Law of Conservation of Matter - matter cannot be created or destroyed, only rearranged or recycled
What is matter?
People Matter (because people are matter)
One characteristic of living things is that they are ________________ based.
Raise your hand if you can name the element that should go in the blank!
carbon
The Carbon Cycle
The Carbon Cycle –
a series of processes through which all of the carbon atoms in the world recycle
Carbon is found in the atmosphere (the air) and oceans as the gas carbon dioxide (CO2).
Atmospheric CO2
Dissolved CO2
Open burning Photosynthesis
RespirationRespiration Fuel Combustion
Fuel Combustion
Photosynthesis
Respiration
Death and decay
Death and decay
Fossil fuels
All life on earth is based on carbon.
Carbon as a Gas
Table Group Point!
What is one process that we already know of that puts carbon dioxide (CO2) into the atmosphere?
Respiration
Cellular Respiration
BOTH plants and animals release CO2 into the air through cellular respiration
For example: Humans breathe in oxygen and breathe out CO2.
Table Group Point!
What is one process that we already know of that takes carbon dioxide (CO2) from the atmosphere?
Photosynthesis
Photosynthesis
CO2 is taken out of the air by plants through photosynthesis.
Plants “breathe in” or exchange CO2 and “breathe out” O2.
Photosynthesis vs. Cell Respiration
Photosynthesis
Cell Respiration
CO2 O2
It’s a cycle! Who can explain how this cycle is evidence of the Law of
Conservation of Matter.
Decomposition
Decomposition – bacteria, fungi, and other organisms breakdown dead plants, animals and waste into carbon dioxide gas and solid carbonates
Fossil Fuels
Fossil Fuels – when living things decompose and the carbon atoms DO NOT find oxygen atoms to bond with, they turn into fossil fuels
Where do fossil fuels come from?
The fossil fuels we use now formed from the bodies of prehistoric organisms that were buried under layers of sediment.
Fossil fuels take a long time to form…
Coal
Coal was formed from prehistoric trees, ferns and mosses.
There are large deposits of coal in the Appalachian region.
Critical Thinking! What will happen if
we burn all of the fossil fuels that we have?
Are fossil fuels renewable resources?
(Remember, a renewable resource is something that can be created as fast as we use it.)
Think – Pair – Share (45 seconds)
How does carbon move from the air to plants?
How does carbon move from plants into the bodies of animals?
Where is solid carbon found?
Think – Write – Share (45 seconds)
Where is carbon dioxide gas found?
How does carbon move back into the air from plants and animals?
How do decomposers contribute to the carbon–oxygen cycle?