Unit 5: How can machines help us? Light and sound

 

Unit 5: How can machines help us?

 

Videos

1. VIDEO

2. Simple machines

3. Simple and complex machines

4. First machines in history

5. Invention of the wheel

Practice

1.Simple machines 1

2.Simple or complex machines

3. Machines

4. https://wordwall.net/es/resource/71220374

5. https://wordwall.net/es/resource/57615775

Light and sound

Algunas actividades para practicar

Completa la frase

Natural or artificial light