Name: Jennifer G Block: D Date: March 3, 2011 Science 10 Digital

Name: Jennifer G
Block: D
Date: March 3, 2011
Science 10 Digital Immersion: Nutrient Cycles
Read our e-textbook pages 68–87.
Nutrient cycles - answer the questions below in sentences.
1. Where are nutrients accumulated or stored for short or long periods?
Chemicals required for plants and animal growth in earths land masses and oceans.
2. Name a biotic process and an abiotic process that allow nutrients to flow in and out of stores.
Decomposition is a biotic process and a river run off is a abiotic procsess.
3. Photosynthesis is an important process in which carbon and oxygen are cycled through ecosystems.
Describe this process. Water-plant-oxygen-energy-carbon dioxide.
4. Cellular respiration is the process in which plants and animals make use of stored energy and release carbon dioxide back
into the atmosphere. Describe this process. Breathe in and out oxygen-take in h2o and carbon dioxide.
5. How is decomposition related to the carbon cycle? Because we are reusing the air we breathe in the same way
decomposers recycle the earth.
6. What is nitrogen fixation? The natural process either abiotic or biotic where the nitrogen is transferred into animonia.
7. What is denitrification? The process of producing molecular nitrogen.
8. What is eutrophication? Recives excess nutrients
The cycling of nutrients in the biosphere
Use the general model of a nutrient cycle to answer the questions below.
the air
1. This diagram illustrates the general model of a nutrient cycle. What types of human activities can affect a nutrient cycle?
Pollution and garbage.
2. How do these human activities affect a nutrient cycle?
It pollutes the air which affects everything in the cycle. And the air.
3. On the diagram above, add terms and arrows that could represent the effects of human activity on a nutrient cycle.
4. How do changes in nutrient cycles affect biodiversity?
5. Reflect on your local community. Discuss a human activity that is affecting your local ecosystem.
The rain, the different changes in weather. Driving cars, electricity
Read our e-textbook pages 71–87 about the carbon, nitrogen and phosphorus cycles.
The Carbon Cycle
1. Why is the carbon cycle important? We need it to breathe and to help the water.
2. How is carbon stored? In the water and the air.
3. How is carbon cycled? Through the cloud into the water
4. Name several human activities that affect the carbon cycle. Oil spillage, cars, use of water.
The Nitrogen Cycle
1. Why is the nitrogen cycle important? To help with the growth of plants.
2. How is nitrogen stored? In the clouds
3. How is nitrogen cycled? By raining
4. Name several human activities that affect the nitrogen cycle. Same ^
The Phosphorus Cycle
1. Why is the phosphorus cycle important? Helps every living thing.
2. How is phosphorus stored? In plants and animals and water.
3. How is phosphorus cycled? Decomposition and rain
4. Name several human activities that affect the phosphorus cycle.