4º NS Unit 6 – MACHINES AND ENERGY (SB pages 86, 87) (AB page 33 and page 34, ex. 6)

 AND

• HOMEWORK:

1. Correct Unit 6 NS DIAGNOSTIC TEST.

2. Click on the links to watch the videos. The videos will help you understand the concepts.

3. Read and do the exercises of these pages:

- NS Student´s Book (pages 86, 87)

- NS Activity Book (page 33 and page 34, ex. 6)

4. Study the concepts.

• LINKS:

SIMPLE MACHINES

https://www.youtube.com/watch?v=WM1BwC3MGTk

https://www.rtve.es/infantil/serie/educlan-9-10-anos/video/ciencias-naturales-maquinas/5561399/

-INCLINED PLANE: An inclined plane is generally used to move something from one place to another.

https://www.youtube.com/watch?v=sTOWiDDgTIk

-WEDGE: A wedge has a pointed end. It can be driven into something to separate it. Wedges are used to separate objects or to hold objects in place.

https://www.youtube.com/watch?v=LAAwZird80k

-PULLEY: A pulley has a rope and wheels. It can be used to pull things up. An old-fashioned well uses a pulley to pull water from underground.

https://www.youtube.com/watch?v=Nj4J7QNeBNk

-SECREW: A screw is an inclined plane wrapped around a rod. It holds things together securely.

https://www.youtube.com/watch?v=dDEhrpFb1BU

-WHEEL AND AXLE: A wheel and an axle is a type of simple machine. A wheel has a rod, or axle, running through it. Your bicycle wheel has a wheel and axle.

https://www.youtube.com/watch?time_continue=1&v=ph8Cfestuik&feature=emb_logo

https://www.youtube.com/watch?v=DML24R1x3W0

-LEVER: A lever is a stiff board or bar that rests on a base called a fulcrum. The fulcrum lifts and moves objects. Scissors and staplers are types of levers.

https://www.youtube.com/watch?v=lueqE0lxLyc