Worksheet 2: Matter and Energy

Use Chapter 3 for reference

Directions:

  • Complete using your textbook to find answers to the following questions. Next week we will spend going over this information and answering any questions that come up. Good luck and have fun! Be sure to look at the grading criteria before and during your work.

Outline Grading Criteria:

  • Outline shows a conscientious effort to be complete and explain the questions posed. Most answers are correct.
  • Student shows depth of answers by explaining, defining, and giving examples where appropriate. If there is a sentence or less for each question, this grading criteria is not met.Sufficient development is required.

Content Outcomes needed for Assessment I:

  • Explain the first and second laws of thermodynamics. Can you give evidence of these laws in action in our wetland?
  • Explain how matter travels through an ecosystem by using the wetland as an example.
  • Explain how energy travels through an ecosystem by using the wetland as an example. Include cellular respiration as part of your response.
  • Explain why the earth needs a constant supply of energy according to the second law of thermodynamics.
  • Explain evidence from the wetland that matter is recycled completely by ecosystems and always has been.
  • Explain the relationship between the 10% rule and the second law of thermodynamics.

Questions:

  1. What are the 6 essential elements? (The six that make up about 95% of living bodies).
  1. If living organisms need more of a particular element, where in the abiotic environment are the elements found?
  2. What is the relationship between PE and KE (how are they related? How are they different)? Give examples.
  1. Explain how photosynthesis is the way that energy enters the trophic pyramid.
  1. Using the equation for photosynthesis describe how the reaction is a good example of

a)The first law of thermodynamics

b)The second law of thermodynamics

  1. In relationship to the tropic pyramid answer the following:

a)How matter and energy enter the pyramid

b)Describe what each level of the pyramid does with the matter and energy they attain

c)How does matter and energy exit the pyramid

d)How does matter and energy move from level to level

e)How much E moves from level to level

f)What happened to the rest of the energy that is not transferred?

  1. What is the relationship between photosynthesis and cellular respiration?
  1. Why do you have to discuss both matter and energy when tracing them through the pyramid or any ecosystem?