The Lab: octubre 2014

miércoles, 29 de octubre de 2014

(unit 1)_ CHANGES IN MATTER AND TYPES OF CHANGES

PHYSICAL CHANGES*

The susbstance changes* but matter does NOT change.

Ex: water freezes*, but it is still water

CHEMICAL CHANGES

New substances are created and matter changes.

Ex: Wood changes into ashes* and gases when it burns.

TYPES OF CHANGES

Irreversible: matter CANNOT RETURN to its original state.

Reversible: matter CAN RETURN to its original state.

*change: canvi

*to change: canviar

*to freeze: congelar

*ash: cendra

(unit 1)_ TYPES OF MATTER

PURE SUBSTANCES cannot be separated into other substances. Examples: iron, salt

MIXED SUBSTANCES are made of two or more substances. Seawater* is a mixture of water and salt

*Sea: mar

Water: aigua

Seawater: aigua de la mar

( UNIT 1)_MASS, VOLUME AND DENSITY

Matter has two general properties:

Mass is the amount* of matter in an object. We can measure* it in kilos.
Volume is the space that an object occupies. We can measure it in litres.

Density is the relationship between mass and volume:

Density=mass/volume

*amount: quantitat

*to measure: mesurar

(unit 1)_ JOINTS

ARTICULACIONS

domingo, 26 de octubre de 2014

(unit 1)_DESCRIPTION OF AN OBJECT

To describe an object you have to follow some steps:

1. Firstly, you have to write what it is.

2. Secondly, write the main material it is made of.

3. Finally, write the properties that you can observe or measure.

Here you have the example we did together:

(What is it?)This is a picture.

(Main material)It's made of wood.

(Properties)It isn't transparent, it's opaque. It's flat and rough. It's hard and stiff. It's not magnetic and it's insulator.

It's a square, it's 20 cm long and 20 cm wide. It weighs 22 g and it's colourful!