ties What I Know Directions: Read the questions carefully. Explain how changes in matter affect the environment. Write the letter of the best answer. 1. The following materials undergo a physical change. Which of the changes in matter has a bad effect on the environment? A. freezing of meat to preserve in a long period of time B. using spray paint to cover the rust in tin cans C. cutting of the fabric to be made into clothes D. evaporation of rainwater 2. The following materials undergo chemical change. Which of these changes in matter has a good effect on the environment? A. burning of plastic B. composting of biodegradable wastes C. exposing alcohol to direct heat or fire D. combustion of gasoline in the car's engine 3. Cutting of trees has its advantages and uses to the people. Which of the following is a bad effect of this activity? A. Cutting of trees may result in house construction. B. Cutting of trees may result in paper production. C. Cutting of trees may result in furniture making. D. Cutting of trees may result in flooding.​