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
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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
