## jueves, 20 de mayo de 2021

### NS3: Machines

Unit 9: Machines

9.1. Simple machines.

9.2. Making things.

9.1. Simple machines.

- There are two types of machines: simple machines and complex machines.

- Simple machines have a few or no moving parts.

- Complex machines are made up of two or more simple machines.

- Some examples are: an inclined plane, a screw, a pulley, a wedge, a Wheel and axle, a lever.

·    An inclined plane.- It moves up and down different levels.

·    A screw.-It holds things together.

·    A pulley.- It lifts heavy objects.

·    A wedge.- It cuts objects.

·    A Wheel and axle.- It moves objects from one place to another.

·    A lever.-It lifts objects.

ACTIVITIES

1.-How many types of machines are there?

Simple machines and complex machines.

2.- What is a simple machine?

Simple machines have a few or no moving parts.

3.- What is a complex machine?

Complex machines are made up of two or more simple machines.

4.- Write some examples of simple machines.

An inclined plane, a screw, a pulley, a wedge, a wheel and axle, a lever.

9.2. Making things

- There are simple tools for making things or taking things apart.

- Some examples of simple tools are: a hammer, a screw, a screwdriver, nuts and bolts, a spanner and a saw.

·                       A hammer.-It is used for knocking nails.

·    A screw.- It is used for fixing objects together.

·    A screwdriver.- It is used for turning screws.

·    Nuts and bolts .- It is used for holding objects together.

·    A spanner.-It is used for turning bolts.

·    A saw.- It is used dor cutting Wood and other materials.

ACTIVITIES

1.- Which are the simple tools?

There are simple tools for making things or taking things apart.

2.- List some examples of simple tools.

A hammer, a screw, a screwdriver, nuts and bolts, a spanner and a saw.

3.- True or False

- A pulley is a simple machine.     TRUE

- A saw is a complex machine.      FALSE

- A spanner is a simple tool.          TRUE.

4.- Complete the sentences

-      ………… is used to cut wood and other materials.

-      ……………..is used for lifting heavy objects.

5.- Draw

 A simple machine A simple tool.

### NS 5: TECNOLOGY

Unit 9: Technology

9.1 Many machines in one.

9.2 Technology influences our lives

9.1 Many machines in one.

- There are two types of machines: simple machines and complex machines.

- Avanced machines such as cars are made up of simple and complex machines.

Ø     Simple machine in cars.

·     They have a mechanical function.

·    Some examples are: Wheel and axle, screw, pulley and level and fulcrum.

·    Wheel and axle.-

-      It is used to move things easy.

-      We can find the steering Wheel in a car.

·    Screw:

-      It goes around a cylinder or a cone.

-      We can use screws to hold things.

-      A car has many of them.

·    Pulley

-      It has a Wheel and axle and a rope.

-      It is used for lifting objects.

-      A car´s brakes work using pulleys.

·    Lever and fulcrum

-      It consits of a level with a support called fulcrum.

-      It is used for lifting an object.

-      A good example is the gearstick in a car.

Ø     Complex machines in cars.

-      Complex machines are made up of two or more simple machines.

-       Some of them have engine or motor.

Ø     Gears

-      Gears are wheels with teeth that fit together.

-      A good example is the chain of a bike.

-      Gears in a car are in the engine.

Ø     Engine and motors

-      A engine or motor is the part of the machine which produces movement.

-      An engine needs fuel to work.

-      A motor needs electricity.

1.- Definition of simple machine.

2.- Definition of complex machines.

3.-List the simple machines you can find in a car and explain one of them.

4.- Which is a gear?.

5.- What is the difference between an engine or a motor?

8.2 Technology influences in our lives.

- Technology help us at work, at home and in our free time.

- There are a lot of inventions which make us our live easier.

Ø     Phone

-      Phones are small computers.

-      You can send messages, find information on internet, listen to music and so on.

Ø     Machines at home

-      Some examples are: dishwashers, microwave, refigerators and so on.

-      There are energy-saving light bulbs are very efficient.

Ø     Industrial changes

-      Companies are using enviromentally friendly new machines.

-      Government créate laws to control industries.

Ø     Education

-      We can find in our classrooms digital boards, tablets and e-books.

Ø     Transport

-      Thanks to the technology our methods of transports are more fasters and secure.

-      Some of them are environmentally friendly using eco-fuel, bio-diesel or solar energy.

Ø     Free time

-      You can watch a movie on TV or at the cinema in three dimensions and special effects.

-      Most mobile phones allow us to make photos or a video.

Ø     Health

-      Examples of technology in a hospital are X-ray, CT scans which help us to detect diseases.

-      There are devices to measure the level of sugar in blood and blood pressure.

Ø     Activity. Answer the following questions:

1.- List the places where the technology has changed our lives.

2.- Explain the industrial changes.

3.- Explain the health changes.

4.- Explain the free time changes.

5.- Explain the transport changes.

6.- Explain the education changes.

## miércoles, 28 de abril de 2021

### NS 3. UNIT 8:ENERGY

Unit 8: Energy

8.1 Different types of energy.

8.2 Sources of energy.

8.1 Different types of energy.

There are many but the most important ones are:

·    Kinetic energy.- We use it for movement.

·    Chemical energy.-We have it in food.

·    Sound energy.- We have it in anything that makes sounds.

·    Thermal energy.-It produces heat. Example: The Sun produces a lot of termal energy.

·    Electrical energy.-It is used every day with light bulbs.

·    Light energy.-It is produced by traffic lights and by The Sun.

ACTIVITIES

1.-Which are the  six most important types of energy?

Kinetic energy, chemical energy, thermal energy, sound energy, electrical energy, light energy.

2.- Match

·    Kinetic                                          sound

·    Electrical                              every day

·    Sound                                          movement

3.- Write below the picture the type of energy.

 chemical   sound   electrical   kinetic   light
 a
 b
 c

Sound         light            chemical

8.2 Sources of energy.

There are two types: non- renewable energy and renewable energy.

Ø     Non-renewable energy.-They come from the ground and the seabed. We cannot replace them. Examples: natural gas, coal and crude oil.

Ø     Renewable energy.-They are The Sun, air and water. They don´t run out. They don´t cause pollution. Examples: solar energy with solar panels, wind farms and hydroelectric power stations.

ACTIVITIES

1.- Which are the two types the sources of energy?

Non-renewable and renewable energy.

2.- Where the non-renewable energy comes from?

a) The ground                     b) The Sun

3.- Write 3 examples of non-renewable energy.

Natural gas, coal and crude oil.

4.- True or False

- The Sun is for renewable  energy.     TRUE

-  Air is non- renewable energy            FALSE

-Renewable energy is better for the environment   TRUE.

5.- Complete the sentences

-      ………… energy sources will never run out.

-      ……………..energy sources run out.

6- List 3 examples of renewable energy.

The Sun, air and water.

7.- Draw

 A non-renewable energy A renewable energy