T next to correct definitions and f next to incorrect ones. An ecosystem

1. 
   Complete the order of biological organization.
   

Cell- - organ- -organism.

2. 
   Write the letter T next to correct definitions and F next to incorrect ones.
   

An ecosystem consists of the animals in a particular area together with the abiotic.

The biosphere is the collection of all ecosystems.

A community is the sum of populations inhabiting a particular area together with the abiotic.

All the individuals of a species living within a specific area are collectively called a population.

3. 
   State the law of conservation of matter.
   

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4. 
   Carbon dioxide enters the atmosphere from all sources EXCEPT:
   

1. 
   cellular respiration
   
2. 
   decomposition
   
3. 
   photosynthesis
   
4. 
   production of cement
   
5. 
   combustion
   

5. 
   Choose which conditions are present in each biome.
   

1. 
   cold climate
   
2. 
   dry climate
   
3. 
   poor soil
   
4. 
   permafrost
   
5. 
   low biodiversity
   
6. 
   mountain region
   

		Conditions
1	Artic tundra
2	Alpine tundra