Unit One Match the Headings Exercise 1 A Giant Step for Artificail Enzymes Exercise 2 Population Growth and Food Supply Exercise 3 More Than Sympathy Exercise 4 Energy form Biological Sources Exercise 5 Sleeping Secrets Exercise 6 It Never Rains Exercise 7 It Never Rains Exercise 8 Germs and Sickness in a Shrinking World Exercise 9 On the Wing Unit Two Cloze Exercise 1 Standard of Mesusement Exercise 2 The Function of Carbon Dioxide in teh Atmosphere Exercise 3 The Properties of Systems in the Human Body Exercise 4 Analysis and Synthesis Exercise 5 The Properties of Elements,Compounds and Mixtures Exercise 6 The Structure of the Earth Exercise 7 The Carbon Cycle Exercise 8 Vitamins Exercise 9 Thermostats Exercise 10 Pressure …… Unit Three Multiple Choice Unit Four Summarizing Unit Five Yes/No/Not Given Unit Six Scanning for Answers Unit Seven Integrated Exercises Unit Eight Practice Tests Answer Key Appendices
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