12. What do you call this force that is able to attract or repel an object across a distance without touching it? A. motion C. gravity B. elastic force D. magnetic force 13. In which of the arrangements of magnets will all of the magnets attract? A. C. N N EN B. D. 14. The following objects that are made of these elements can be attracted to a magnet EXCEPT one. Which is it? A. nickel C. sulfur B. cobalt D. iron 15. What do you think will happen when a light is obstructed by an opaque object? A. The light becomes dimmer. C. A shadow is formed. B. The light is turned off. D. The light bends. 16. The following statements about light are true EXCEPT one. Which is it? A. Light rays could not be blocked and they could pass through all types of materials since they travel on a straight line. B. A laser is a narrow but powerful beam of light capable of travelling far distances on a straight line. C. The light that strikes a mirror gets reflected. D. Light travels in a straight line when it passes through a single medium. 17. In which medium can sound travel faster? molecules C. solids A.​