Identify the word being described by each number and choose the letter of your answer from the choices below. Write these on the space provided before the number. (Shade the letter of your answers in the Evalbee sheet). A. Atmosphere D. Greenhouse gases B. Greenhouse E. Global warming C. Greenhouse effect 21. This process keeps the Earth's surface warm. 22. These include carbon dioxide, water vapor, methane and chlorofluorocarbons. 23. It is used by farmer to protect plants from excessive cold or heat and pests. 24. It occurs when gases like carbon dioxide accumulate in the atmosphere making the earth much warmer that may cause sudden shift in climatic conditions. 25. It is a massive blanket surrounding the Earth
