[ 529 ] Physical Science GED ® TEST SCIENCE FLASH REVIEW • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • In a physics lab, a student heats an iron block. He measures the temperature change and mass of the block as it heats up. He calculates the thermal energy transferred to the block. The results are shown in the following graphs. 16 14 12 10 8 6 4 2 0 0 10 20 30 40 50 Change in Temperature (K) Mass (kg) Thermal Energy (kl) 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 10 20 30 40 50 Change in Temperature (K) Which best describes the experimental results in words? A. The thermal energy decreases at a constant rate, while the mass stays constant. B. The thermal energy increases at a constant rate, while the mass stays constant. C. The thermal energy decreases at a constant rate, while the mass increases. D. The thermal energy increases at a constant rate, while the mass decreases.