TY - BOOK AU - OXLADE Chris TI - Mixing and separating SN - 9780750255141 (pbk) : PY - 2006/// CY - Great Britain PB - Wayland N2 - This book looks at how materials can be mixed and separated. When two materials are mixed together they can be separated by sieving, filtering, skimming or by evaporation. But when some materials are mixed together they cannot be separated because the materials have changed forever ER -