Contents
Physics Unit 9 Forces and motion 9.1 Seeing forces 9.2 Forces big and small 9.3 Weight – the pull of gravity 9.4 Friction – an important force 9.5 Air resistance 9.6 Patterns of falling End of unit questions
Reference 128 131 134 136 138 140 142
Unit 10 Energy 10.1 Using energy 10.2 Chemical stores of energy 10.3 More energy stores 10.4 Thermal energy 10.5 Kinetic energy 10.6 Energy on the move 10.7 Energy changing form 10.8 Energy is conserved End of unit questions
144 146 148 150 152 154 156 158 160
Unit 11 The Earth and beyond 11.1 Day and night 11.2 The starry skies 11.3 The moving planets 11.4 Seeing stars and planets 11.5 The Moon and its phases 11.6 A revolution in astronomy 11.7 400 years of astronomy 11.8 Journey into space End of unit questions
162 164 166 168 170 172 174 176 178
Laboratory apparatus Units How to measure a length How to measure a temperature How to measure a volume of liquid How to construct a results table How to draw a line graph Glossary and index
180 181 181 182 182 183 184 185
Acknowledgements
191
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