Praxis Middle School Science: Thermodynamics Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. Which of the following concepts best describes a chlorophyll molecule absorbing light and changing it into chemical energy?

Question 2 2. When something is moving it has _____ energy.

Question 3 3. What are the laws of thermodynamics?

Question 4 4. Enthalpy change is

Question 5 5. A metal bar has an original length of 2 meters and an expansion coefficient of 0.01. If you heat it up from 27 degrees Celcius to 37 degrees Celcius, by how much will the length change?

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Question 6 6. What does the linear coefficient of thermal expansion refer to?

Question 7 7. An endothermic reaction is:

Question 8 8. When a bond forms, energy is given off to the surroundings. This is an example of

Question 9 9.

The second law of thermodynamics states that:

I. Energy can neither be created nor destroyed

II. All free energy cannot be converted into usable energy

III. The entropy of a system increases over time

Question 10 10. Why do bridges need expansion joints?

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Question 11 11. When energy is unavailable to be used it is called _____.

Question 12 12. Why is the zeroth law of thermodynamics important or necessary?

Question 13 13. Which of the following is the best definition of thermal expansion?

Question 14 14. What is thermodynamics?

Question 15 15. Why does running a jar under hot water make it easier to open?

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Question 16 16. An example of an exothermic reaction is:

Question 17 17. The fact that energy can be neither created nor destroyed is _____.

Question 18 18. If object A has a temperature of 50 degrees Celsius, and object A is in thermal equilibrium with objects B and C, which of the following statements can NOT be concluded from the zeroth law of thermodynamics?

Question 19 19. What does it mean when the enthalpy change for a reaction is negative?

Question 20 20. What is the zeroth law of thermodynamics?

Praxis Middle School Science: Thermodynamics Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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