8. Decomposition is a physical and chemical process by which dead organic matter is broken down. Why
is decomposition important to life processes? (TAG and Complete Sentences)
9. All living things require matter.
Explain why life on Earth depends on matter.
Describe how plants and animals get the matter they need to survive.
10. Living things are mostly made up of four elements: carbon, hydrogen, nitrogen, and oxygen. Describe
how plants and animals obtain these elements.
Plants:
Animals:
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8. Decomposition is a biological process that includes the physical breakdown and biochemical transformation of complex organic molecules of dead material into simpler organic and inorganic molecules. The process is a part of the nutrient cycle and is essential for recycling the finite matter that occupies physical space in the biosphere. Bodies of living organisms begin to decompose shortly after death. Decomposition of organic matter is largely a biological process that occurs naturally.

9. Life depends on matter because living things can be considered matter. All living things need matter to carry out life processes and materials to grow. Plants get matter because they need water and air. They both provide matter.

10. Plants obtain carbon by taking in carbon dioxide in the leaves. They get hydrogen by photosynthesis. They get nitrogen by by photosynthesis. They get oxygen by photosynthesis.

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