14. What can you say about effects of decaying material on one's health and safety? A. Decaying materials can be recycled. B. Decaying materials can make a person sick. C. Decaying materials can make a person happy. D. Decaying materials can make a person healthier. 15. What change occurs when a solid material is pressed? A. aspect change C. chemical change B. physical change D. emotional change 16. Which of the following materials become solid when cooled? A. butter and water C. alcohol and lollipop B. candle and wood D. crayon and chocolate 17. Why does mother put the leftover food in a refrigerator? A. To become solid B. To let it rest in a cold place C. To avoid spoilage since microorganism do not grow fast in cold place D. To avoid smelling bad since microorganism grow fast in cold place​