Water is an example of matter
Water is an example of matter
Water is made from hydrogen and oxygen.
It has three characteristics:
• Water does not smell. It is odorless
Water does not have colour. It is colourless
Water has no taste. It is tasteless.
Changes of state in water.
Water melts.
• Solid to water.
Liquid to solid.
• Water freezes
Liquid to vapour
• Water evaporates.
Vapour to liquid
• Water condensates.
A pure substance consists of only one component.
A mixture happens when we put two or more substances together.
There are two types of mixtures
Heterogeneous mixture
• We put two or more substances together but we can see them separately.
Homogeneous mixtures
• We can´t see each of them separately.
Waste
Waste is all the rubbish we throw away.
Organic waste.
• It is biodegradable. It comes from plants and animals.
Recycable waste.
Non- recyclable waste.