INCREDIBLE ENERGY
1-Energy everywhere
1.1Write true or false.
1false
2 true
3true
4false
1.2Complete the sentences.
1energy
2kinetic
3wind
4sailing boats
5potential
6stored
1.3Order the words
1When we stretch a rubber band, we give it energy
2When we jump on a trampoline this stretches its springs
3When we stretch a trampoline this gives the springs potential energy
4When springs can't be stretched any more potential energy is converted into kinetic energy
1.4Circle the correct words
1potential
2energy
3kinetic
4potential
5kinetic
2-Heat energy
2.1Match
1Heat energy from the sun makes Earth warm
2Inside our body, heat energy keeps us warm
3We can use heat energyto make our homes warm
4When heat is added to something its temperature is higher
5When something is cold it has low temperature
2.2Circle the correct words
1atoms
2molecules
3small
4more
2.3 Match. Then write the words
1-3-liquid molecules
2-1-solid molecules
3-2-gas molecules
2.4Complete the sentences
1cooler
2conduction
3temperature
4materials
5wood
2.5Answer the questions
1We have to stop heat moving from the inside to the outside
2They stop heat movijng from warm places to cold places
3Because it is a good insulator
4It holds air next to our body
3-Sound and light
3.1Complete the chart
things that are transparent: windows water air
things that are opaque: walls trees doors
3.2Order the words
1Sounds and light are types of energy that travel in the air
2Soud happens when something vibrates
3When a drum vibrates it makes the air around the drum vibrate, too
4The vibrations travel throug the air in all directions
5The vibrations of sound in the air are called sound waves.
3.3Correct the sentences
1Sounds lose energy and get weakerwhen they move
2To send sounds from one place to another, sound waves are converted into radio waves
3Radio waves are inviseble. We can't see them
4Cell phones convert radio waves back into sound waves so that we can hear the sounds
3.4Write true or false
1True
2False
3True
4False
5False
6True
3.5 Write about sounds that you like
I don't like a lot the music but I like the sound of the whishtles
4-Chemical energy
4.1Complete the puzzle
1Fuels
2Potential
3Energy
4Kinetic
5Powders
6Sound
7First
8Sparks
9Materials
Secret word: Fire works
4.2Match
1We use chemical energy from food to live, to move and to grow
2Plants convert light energy from the sun into chemical energy
3Plants store chemical energy
4Animals est plants to use someof the chemical energy from the plant
5In food chains energy from food moves from one living thing to another.
4.3Complete the sentences
1Sun
2Energy
3dissolves
4chemicals
5-Electricity
5.1Write the type of energy.
1Heat energy.
2Light energy
3Sound energy
4Kinetic energy
5.2Complete
1electrons
2electricity
3Lightning
4Movement
5.3Write true or false
1True
2False
3False
4True
5True
5.4Order the words
1In a toster, electricity is used to cook bread.
2Wires inside a toaster aremade from a type of metal that slows down the electricity so that some of its energy is converted into heat
3In a hairdryer, electric wires gives us heat
4In a lamp, electricity makesa wire so hot thay it becomes white and glows
5.5Answer the questions
1Batteries
2Because they store electricity
3When we turn on the machine
4Because they havechemicals that are dangerous
6-Fuels for energy
6.1Find the words
1Fuels
2Coal
3Oil
4Ancient
5Jungle
6Earth
7Heat
8Mud
9Animals
10Plant
6.2Circle the words
1Gas
2Plants
3Oceans
4Miners
5Ground
6Mostly
7Oil
6.3Order the words
1What do large power stations use to make electricity? Coal
2Why do people burn coal in a coal power station? Because it boil water that make a turbine turn.
3What type of energy does steam from boiling water have? Kinetic energy
4In a power station, what does steam turns? It turns a turbine
5How does a turbine help to make electricity? It turns a generator
6.4Write true or false
1False
2True
3True
4True
7-Problems with fuels
7.1Write sentences with these words
1Fossil fuels are made from plants and animals that lived million years ago
2These fuels are non-renewable because for make it we need a lot of time
3Oil is a type of fossil fuel
4Gas is a type of fossil fuel
7.2Correct the sentences
1Fossil fuels make different gase that make the air dirty
2Air pollution is bad for plants, animals, and people.
3Power stations and vehicles accelerate air pollution
4Air pollution is worse in cities where there are a lot of cars
5In some cities, people wear a mask over their bicycle
7.3Write the sentences in order
1Heat from the sun warms Earth
2Some heat bounces off Earth and goes back into space
3Greenhouses gases stop some heat going back into space
4Greenhouses gases store heat and keep Earth warm
7.4Complete the sentences
1Air
2Climate
3Warming
4Fires
5Ice
6Uranium
7Invisible
8-Saving Energy
8.1Match
1We need to use fewer fossil fuels
2Renewable energy comes from wind, water, and sunlight
3Renewable energy will not run out
4People use solar energy to heat water and to make electricity
5Solar panels in a roof use heat from the sun to warm water
6Photovoltaicncells convert sunlight into electricity
8.2Complete the sentences
1Air
2Turbines
3Tall
4Blades
5Propeller
6Generator
8.3Answer the questions
1Kinetic energy
2The water make turn a generator
3It holds the water so it becomes a store a lot of potential energy
4The potential energy is converted into kinetic energy
5It makes electricity for about 1.3 million people
8.4Write about the things you do to save energy
I turn off the lights when I'm not in the room.
