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Good Science Victorian Curriculum Year 7

Digital sample of Matilda's newest publication, Good Science Victorian Curriculum Year, authored by Emma Craven and Aaron Elias. For more information visit www.matildaeducation.com.au or email Katrina Tucker, katrinatucker@matildaed.com.au

Digital sample of Matilda's newest publication, Good Science Victorian Curriculum Year, authored by Emma Craven and Aaron Elias. For more information visit www.matildaeducation.com.au or email Katrina Tucker, katrinatucker@matildaed.com.au

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Chapter 5<br />

Mixtures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66<br />

5.1 Mixtures and pure substances. 68<br />

5.2 Solute, solvent, solution. 70<br />

5.3 Water as a solvent. 72<br />

5.4 Separation techniques:<br />

filtering and decanting. 74<br />

5.5 Separation techniques: froth<br />

flotation and magnetic separation. 76<br />

5.6 Separation techniques:<br />

evaporation and distillation. 78<br />

5.7 Separation techniques: chromatography,<br />

centrifugation and funnel separation. 80<br />

5.8 Water filtration and waste<br />

management. 82<br />

5.9 Cleaning up oil spills. 84<br />

Visual summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86<br />

Final challenge. 87<br />

EARTH AND SPACE SCIENCES. 88<br />

Chapter 6<br />

Earth, the Sun and the Moon . . . . . . . . . . . . . . . . . . 88<br />

6.1 Day and night . 90<br />

6.2 Seasons. 92<br />

6.3 Eclipses. 94<br />

6.4 Models of the solar system. 96<br />

6.5 The technology of discovery . 98<br />

Visual summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100<br />

Final challenge. 101<br />

Chapter 7<br />

Earth’s resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102<br />

7.1 What is a resource? . 104<br />

7.2 Non-renewable resources. 106<br />

7.3 Renewable resources. 108<br />

7.4 Conserving Earth’s resources . 110<br />

7.5 Scientists involved in mining . 112<br />

7.6 Resource use and the environment. . . . . . . . . . 114<br />

Visual summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116<br />

Final challenge. 117<br />

PHYSICAL SCIENCES . 118<br />

Chapter 8<br />

Forces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118<br />

8.1 Balanced forces. 120<br />

8.2 Unbalanced forces. 122<br />

8.3 The size and direction of forces. 124<br />

8.4 Friction. 126<br />

8.5 Factors affecting friction. 128<br />

8.6 Gravity . 130<br />

8.7 Unbalanced gravitational forces. 132<br />

8.8 Reducing the impact of forces. 134<br />

8.9 Simple machines. 136<br />

Visual summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138<br />

Final challenge. 139<br />

INVESTIGATIONS<br />

AND KEY SKILLS. 140<br />

Glossary. 184<br />

Index. 187<br />

Acknowledgements . 190<br />

v

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