5. Which process allows the flow of heat in the absence of matter? A. Conduction C. Convection B. Insulation D. Radiation 6. Which material below conduct heat poorly? A. Conductor C. Radiator B. Convector D. Insulator 7. How does heat travel through the soup while cooking? A. by radiation B. by convection C. by dispersion D. by conduction 8. In what direction does heat travel through the soup? A. from top to bottom C. both A and B B. from bottom to top D. neither A nor B 9. What will happen when two unlike charges are brought together? A. They will repel each other. C. They will neutralize each other. B. They will attract each other. D. They will have no effect on each other. 10. Which of the following describes the usual way by which a material can gain a negative charge? A. By gaining protons C. By losing protons B. By gaining electrons D. By losing electrons 11. If you rub the balloon with a cloth and the balloon becomes positively charged, what will happen to the balloon if you put it near your hair? A. It will attract your hair. C. It will become positively charged. B. It will repel your hair. D. It will become neutrally charged. 12. Which of the following can be attracted by a positively charged object? A. Any other object. C. A positively charged object. B. No other object. D. A negatively charged object​