SCIENCE semana del 4 al 8 de mayo

Good morning everyone!!!

UNIT 8: MATERIALS AND  MACHINES!!!
Today we´re going to start a new unit of science. You can still continue with the TEST of the last unit if you have not finished.
Are you ready?? OK.

• MATERIALS

To warm up we´re going to watch this video:

• https://youtu.be/xOKr462HLc0

Metal, plastic, wood, glass... just some of the materials we use to make the things that surround us. Materials are the matter or substance that objects are made from.

We use a wide range of different materials daily; these might include:

• metal
• plastic
• wood
• glass
• ceramics
• synthetic fibres
• composites (made from two or more materials combined together)
• Now you can read your science book in pg. 80 and 81.

• Examples of natural materials: 

1. From plants: Cotton, hemp, wood...(algodón, cáñamo o madera...)
2. From minerals: Marble, granite, gold...( marmol, granito, oro...)
3. From animals: Wool, leather, silk...(lana, cuero, seda...)

• Examples of man-made materials:

1. Paper: the raw material is wood
2. Iron: A mixture of diferent minerals (hematite and magnetite)
3. Plastic: the raw material is petroleum

ACTIVITIES  (In your notebook)

1. Name 3 natural materials and 3 man-made ones
2. What man- made material is obtained from wood?
3. What are the raw materials for iron and plastic?

And now... Activity book pg 32. Exercises 1 and 2.

Ahora, por si tienes alguna duda, aqui va un video sorpresa!!!! para que os ayude:

https://youtu.be/ea5odQ8pXDc

• PROPERTIES OF MATERIALS

Materials have different features, or properties, which make them suitable for different uses. Watch this video.

https://youtu.be/C4UlCEMlo9k?t=52

The main properties of materials are:

1. Transparency ---------------------} Transparencia
2. Hardness/Softness--------------} Dureza o suavidad
3. Elasticity/ Flexibility...............} Elasticidad y Flexibilidad
4. Lustre: Shiny/Dull---------------} Brillo o mate
5. Waterproof ------------------------} Impermeabilidad