UNIT 2: ENERGY, TOOLS AND MACHINES

NATURAL SCIENCE

SECOND LEVELPRIMARY

CEIP SANTA ANAMADRIDEJOS

(TOLEDO)

Mª Isabel López

MACHINESMachines are instruments which make our

work easier. There are simple machines and complex machines.

LEVERWHEEL

SCREW

SIMPLE MACHINES: It´s a basic tool that is used to do work.

WEDGE

INCLINED PLANE

PULLEY

COMPLEX MACHINES: Two or more simple machines working

together.WHEELBARROW CRANE

WHEEL

LEVER

WHEEL

LEVER

PULLEY

ESCALATOR

SCISSORS

INCLINED PLANE

PULLEYS(inside)

WEDGES

LEVERS

COMPUTERSComputers are machines. We use computers to do work, to listen to music and to play games. When a computer is connected to the Internet, we can look for information and communicate with people by email.

PRINTER

KEYBOARD

MONITOR

CPU

SPEAKERS

MOUSE

THEN AND NOW

In the past, horses pulled ploughs.

In the past, people washed their clothes

in rivers.

Today, tractors pull ploughs.

Today, people wash their clothes in

washing machines.

IN THE PAST

TODAY

• All tools and machines need energy to move.

• Energy is ability to do some work.

• Energy can be stored.

• There are different types of energy.

ENERGY

TYPES OF ENERGY

HYDEL ENERGY

SOLAR ENERGY HEAT ENERGYWIND ENERGY

HUMAN ENERGYELECTRICAL

ENERGY

ELECTRICITY AND HUMAN ENERGY

Many of the machines that we use every day work with electricity

REFRIGERATOR

TV

FAN

WASHING MACHINE

DRILL

COMPUTER

Some machines, for example bicycles, work with human energy

PENCIL SHARPENE

R

TIN-OPENER

RAZOR

SQUEEZER

BICYCLE

SCISSORS

LIGHTNATURAL LIGHT ARTIFICIAL LIGHT

THE SUN

THE MOON

A CANDLE A TORCH

A FIRE A LAMP

ENERGY, TOOLS AND MACHINES