3 What happens to water when it boils? a It changes color. b. It stops bubbling, It becomes heavier. d. It changes into water vapor. 4. What will you do to dissolve sugar faster in a cup? a Use cold water. b. Use hot water. c Add more water to the sugar d. Add more sugar in the water. 5. Which of the following changes in the materials are useful to the environment? 1 Using old tires as flower pots IL Burning of old tires and other plastic materials. Turning empty plastic bottles into beautiful flower vase IV. Using eco-bag or native baskets instead of plastic bag at grocery store a. I, II, III, and IV b. II. III. and IV C. I. III, and IV d. III and IV​