Phase Changes for Liquids & Solids - ORELA Middle Grades General Science 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!

Page 1

Question 1 1. The amount of energy required to change a liquid into a gas at its boiling point, is called:

Question 2 2. A scientist measures the pressure and temperature of a sample. When they plot the data on their phase diagram, they make a point on a vertical line directly above the critical point. What's definitely true of the sample?

Question 3 3. What makes ionic crystals, such as calcium chloride, very hard and brittle?

Question 4 4. What is a phase diagram?

Question 5 5. What is happening at the triple point on a phase diagram?

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Question 6 6. The complete three-dimensional arrangement of particles within a crystal is known as the _____, while the smallest repeating unit in the lattice is called the _____.

Question 7 7. What of the following is NOT one of the types of crystals?

Question 8 8. An example of condensation is:

Question 9 9. At the melting point and boiling point what happens?

Question 10 10. Which of the following is most likely to lead to a phase change?

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Question 11 11. What is the triple point?

Question 12 12. For water, how are pressure and boiling point related?

Question 13 13. Why are metallic crystals, such as gold nuggets, known to be good conductors of electricity?

Question 14 14. What is a dipole-dipole force?

Question 15 15. Substances in which phase of matter have the most space between particles?

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Question 16 16. What is NOT something that a phase equilibrium line shows?

Question 17 17. Calculate how much heat energy (q) is needed to melt 10 grams of gold at its melting point. Note: gold has a heat of fusion of 15.4 cal/g.

Question 18 18. The energy required to change a solid to a liquid at its melting point is called:

Question 19 19. The phase change when a solid goes directly to a gas is called:

Question 20 20. Which of the following do phase diagrams show?

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Question 21 21. How is water's phase diagram different from the phase diagram of carbon dioxide and carbon?

Question 22 22. What is NOT something that you would find on a phase diagram?

Question 23 23. When you cross the line on a phase diagram and go from a solid to a liquid, what has occurred?

Question 24 24. Gas can be turned into a plasma on Earth with the addition of:

Question 25 25. What takes more energy: changing a liquid to a gas or changing a solid to a liquid?

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Question 26 26. What was the Kinetic Molecular Theory designed to explain?

Question 27 27. Calculate how much heat energy is required to turn 100 grams of iron into a gas at its boiling point. The heat of vaporization for iron is 69.1 cal/g.

Question 28 28. What determines the shapes that different types of crystalline solids can take?

Question 29 29. Which of the following is NOT a characteristic of solid particles?

Question 30 30. The phase change when gas turns directly into a solid is called:

Phase Changes for Liquids & Solids - ORELA Middle Grades General Science 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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