CONTENIDOS:
- Materia y sustancia: concepto.
- Las propiedades de la materia: masa y volumen.
- Estados de la materia: sólido, líquido y gaseoso.
- Cambios de estado en el agua. Usos prácticos de cada uno de estos estados.
CRITERIOS DE EVALUACIÓN:
- Comprende y explica los conceptos de materia y sustancia.
- Distingue los conceptos de masa y volumen e investiga la masa y volumen de distintas sustancias.
- Señala el estado de una materia dada y ofrece más ejemplos de cada estado.
- Explica la fusión, evaporación y condensación del agua.
- Conoce la importancia del agua en todos sus estados y explica algunos usos de cada uno de ellos.
VOCABULARY:
Matter
Solid
Liquid
Gas
Ice
Vapour
Mass
Volume
Shape
Smell
Hardness
Substance
Melting
Evaporation
Condensation
Everything around us that takes up space is matter. Living and non-living things are made up of matter. Even things that we can't see, like air, are made of matter.
Two important properties of matter are mass and volume. Mass is the amount of matter and volume is the space it takes up. Some other properties are the hardness (hard or soft) and the smell.
Matter exists in three states: solid, liquid and gas.
- Solids have a fixed shape and volume, like rocks, ice or plastic.
- Liquids have a fixed volume, but can change their shape, like water, orange juice or coke.
- Gases adapt to the space they are in, like oxygen or vapour.
Can you name three solids? What about three liquids? And three gases?
Well done!
Liquid water is found in lakes, rivers or oceans; we drink it, wash our bodies with it and water plants with it.
Solid water is called ice. We can find it on the Poles and also in our fridges!
Gaseous water is called vapour. We can see a lot of it when we cook!
- Melting: ice is heated and turns into water.
- Evaporation: water is heated and turns into vapour.
- Condensation: vapour is cooled and turns back into water.
