Quiz and Cloze Notes

The Student Guide and Introduction to Geothermal – Starter Pack contain the quiz and cloze notes.
Quiz Answer Key: Q1:A Q2:C Q3:B Q4:D
Cloze Notes Answer Key: Geothermal; heat; buildings; electricity; flexible; surface; expensive

Data Set

The Student Guide contains the Introduction to Geothermal – Data Set.
Answer Key: Question 1: Globally, geothermal energy capacity has increased significantly between 2000 and 2024, showing a strong upward trend in the use of geothermal energy worldwide. However, this trend is not the same across all economic regions. For example, low-income countries have shown no growth at all in this time period.
Question 2: Increase = 15,411.61 MW – 8,272.70 MW = 7,138.91 MW
Percent increase = (7,138.91 / 15,411.61) x 100 = 46.32% percent increase
Question 3: Upper-middle-income countries have contributed the most to the increase. Between 2000 and 2024, their capacity increased by 4,057.5 MW. This is the largest increase among all income categories.
Question 4: Answers will vary. (Example: Low-income countries may face financial, technical and infrastructure barriers that make it difficult to develop geothermal energy projects.)
Question 5: Answers will vary. 

Heat Transfer Hands-On

The Student Guide contains the Heat Transfer Lab – Student questions.
Reflection Question Sample Responses
Question 1: Answers will vary depending on student data.
Example:
Chilled Soil: Starting temperature = 40°C, Final temperature = 30°C after 5 minutes
(30 − 40) ÷ 5 = −2.0°C/min
Room-Temperature Soil: Starting temperature = 40°C, Final temperature = 35°C after 5 minutes
(35 − 40) ÷ 5 = −1.0°C/min
Note: Students should correctly substitute their measured values, perform the calculation, and include units (°C/min). A more negative value indicates a faster decrease in temperature.
Question 2: (Sample Student Response: The chilled soil container had the greater average rate of temperature change (a steeper downward slope on the graph). This indicates that thermal energy moved more quickly from the warm water into the cooler soil. Because the chilled soil had a larger temperature difference from the warm water, thermal energy was transferred at a faster rate.)
Question 3: Answers will vary. (Sample Student Response: In this experiment, the soil transferred thermal energy to or from the warm water. Similarly, geothermal systems circulate water through underground pipes, where the ground’s relatively constant temperature can warm the water in winter or cool it in summer. Because the ground helps provide heating and cooling, buildings use less electricity to maintain comfortable indoor temperatures.)