Mixtures and Solutions
VocabularyA mixture is a combination of 2 or more substances that are put together, CAN be easily separated and do not make something new.
A solution is a combination of 2 or more substances that are put together, CANNOT be easily separated and make something new. NotesMixtures can be separated in many ways. You can use your hands, magnets, sieves, filters, decanting and many other things. The more different the properties in a mixture are, the easier it is to separate the substances.
When the substances in a mixture have different particle sizes, they are separated by filtration. The mixture is poured through a sieve or filter. The smaller particles slip through the holes, but the larger particles do not. Filtration is the first stage in water recycling.Tea leaves do not dissolve in water, so you can use a strainer to FILTER them. To search for tiny particles of gold in rivers, a mixture of sand, mud, and gravel is scooped up in a pan and swirled around. Gold particles are heavier than the other particles, so they settle to the bottom of the pan. The lighter particles stay suspended in the water, and are decanted (poured off). |