Year 4

Science Revision PackMay 2019

Dear Parents,

For Science you can support your child and help prepare by looking over the five topics we have studied this year. Each section has a revision papers and then questions to practise.

You can also use education city games to make it fun and recap using the Science Rising Stars textbook. Youtube is a great support t

Assessment dates:

Date Subject ClassesTuesday 28th May Science Revision All classes

Wednesday 29th May Science Bronze, Blue, Gold, Turquoise, Emerald, Green

Thursday 30th May Science Purple, Yellow, White, Red, Silver, Orange

Sound

Sound Questions

1. Which one of these statements is true? Tick the correct answers.

Sounds travels faster in water than in air Sounds travel faster in air than in water Sound travels fastest through a solid Sound travels at the same speed through a solid, liquid and gas

2. How can we change the volume of sound made by the drum?

Beat it louder Pull the drum skin tighter Make the drum bigger Make the drum smaller

3. Tick the correct statements.

Sound gets louder the further away you are from the source Sound stays the same no matter how close you are to the source Sound gets louder the closer you are to the source Sound gets quieter the further away from the source you are.

4. Write an explanation of how sound travels.Use these key words: air vibration waves_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

5. Place a tick in the box that shows the sound with the highest pitch.

Solid: They are difficult to

compress. They keep their shape and

do not flow. They always take up the

same amount of space. They do not spread out like gases.

Liquid: They can easily be poured

and flow. They are not easy to hold. Liquids change their shape

depending on the container they are in.

Even when they change their shape, liquids always

Gas: Gases are all around us. They are often invisible They spread into all of

the empty spaces they can and take the shape of the container they are in.

Changing States Revision

1. Please fill in the blanks with the words provided. Liquids, solids and gases are all made up of _________________. In a solid __________ are held very _______ together to form a regular __________ and they

Solid: They are difficult to

compress. They keep their shape and

do not flow. They always take up the

same amount of space. They do not spread out like gases.

Liquid: They can easily be poured

and flow. They are not easy to hold. Liquids change their shape

depending on the container they are in.

Even when they change their shape, liquids always

Gas: Gases are all around us. They are often invisible They spread into all of

the empty spaces they can and take the shape of the container they are in.

The Water Cycle (YouTube: water cycle song.)

Evaporation occurs when liquid water warms up and changes into water vapour in the air.

Condensation occurs when water vapour cools down and forms clouds.

Precipitation occurs when clouds become too dense and water droplets come together to form rain/sleet/snow/ hail.

Transpiration occurs when liquid water evaporates through plants.

How can you change the state of water?

To turn a solid into a liquid, and a liquid into gas, add energy (heat).

To turn a gas into a liquid, and a liquid into a solid, remove energy (cool).

Boiling point of water: Freezing point of water:

100° 0°

can only __________. In liquids they are ______ together, but they can ______ past each other and they have ___ regular __________. In gases, instead, __________ are free to ______ in all __________ at a very high speed.

1. Label the water cycle with the words provided.

2. What is the boiling point of water? 50° 0° 100° 6.

3. What is the freezing point of water? 50° 0° 100°

4. Circle the true statements. a) To change a solid into a liquid, I heat it. b) To change a liquid into a gas I cool it. c) To change a gas into a solid, I cool it. d) To change a liquid into a solid, I heat it.

5. Name a liquid and explain how you know it is a liquid.

Electricity RevisionElectricity is an energy created by generators which can be powered by gas, coal, oil, wind or solar.

move close no slide directions pattern

particles vibrate particles tightly patternparticles

Precipitation

Condensation

Evaporation

Transpiration

Groundwater

Where else might you see evaporation? ____________________________

What would happen if one stage of the water cycle was left out? _______________________________________________________________________________________________________________

After how many minutes did the water reach boiling point? ____________________________

What happened to the temperature of the water between 4 and 5 minutes? Explain why you think this happened. ___________________________________________________________________________________________________

______________________________________________________________________________________________________________________________

The electrical energy can be converted into other types of energy such as light, heat, movement or sound. These can be used as mains electricity or electricity in a battery. This energy can be used to power electrical items such as toasters, kettles, cookers, televisions and computer tablets.

Electrical circuitsIn electrical circuits, we use these symbols:

Wire

For the circuit to work, it needs to be connected. E.g. this circuit would not work, as there is no wire between the battery and the bulb.

Many circuits have switches, which control the flow of electricity. It would be dangerous to leave electrical appliances on all the time, as they can overheat. It would also be very expensive. Switches allow us to use appliances when we need them. Below you can see the symbols for open and closed switch.

A conductor is a material that allows heat or electricity to move

easily through it.

An insulator is a material that does not allow heat or electricity

to more through it.

A series circuit is a closed circuit, in which the current

follows one path. The current and voltage going through each

component is the same.

A parallel circuit is a closed circuit in which the current

divides into two or more pathways before recombining

to complete a circuit.

1. Write the items into the correct place in the Venn diagram.

2. Using the correct symbols, draw a series circuit. 3. Using the correct symbols, draw a parallel circuit.

4. Explain the difference between a series and parallel circuit. __________________________________________________________________________________________

5. Why do some circuits use switches? __________________________________________________________________________________________

6. Would this circuit work? Explain why. ____________________________________________________________________________________________________________________________________________________________

7. Would this circuit work? Explain why

8. What is the difference between a conductor and an insulator? Then, circle the conductors. ___________________________________________________________________________________

Wooden spoon Copper wire Plastic fork Coin Sea water

Mains electricity Battery Items to sort: Toaster Mobile phoneWater bottleLaptopTorchCarTV remoteGlobeHairdryerFootballBicycle

____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Rubber wheel Paper Pencil T-shirt

Animals and humans

What kinds of teeth do you have?

The incisors are the front four teeth on the top and also on the bottom. They are flat and sharp like chisels.

Next come the canines. They are the “fangs” in animals that bite! They are long and pointed.

The molars are the back teeth, sometimes called the cheek teeth. They are flat and wide.

Your sharp front teeth work like scissors to cut off pieces of food.

You can use your pointy canines to tear off tough pieces of meat.

Your flat molars grind up the food so you can swallow it.

What is your digestive system?The digestive system makes sure the body gets the nutrients it needs to grow and get rid of waste.The main parts are;

Mouth: Tongue and teeth. The mouth chews the food to make it easy to swallow.

Oesophagus: The tube that takes the food down to your stomach. Stomach: A bag that holds the food to start with. Some digestion

happens here. Small intestine: Here is where most of the digestion takes place.

Nutrients and minerals from the broken down food get absorbed into your body.

Large intestine: In the final stage, water is absorbed and waste is prepared for disposal.

What is a food chain?

Food chains show information about what animals eat and the transfer of energy.Producer: ‘Produce’ means make. Plants produce the food that starts every food chain.Prey: Most prey eat the producer if they are the primary consumer. Consumer simply means eat.Predator: The predator is always a carnivore or omnivore. They eat the prey.

(Producer) (Prey) (Predator)

Questions

1. How many incisors do humans have?

4 6 8

2. What is the function of:a) Canine teeth

………………………………………………………………………………………………………………b) Molars

………………………………………………………………………………………………………………3. A group of Year 4 children investigated how liquids can affect teeth. They decided to use boiled eggs

instead of teeth. They left boiled eggs, still in their shells in different liquids for two days and recorded what happened.

Here are their results of the test:a) Which liquid do you think would cause the

most tooth decay based on these results?

………………………………………………….b) Which liquid is best for your teeth?

………………………………………………….c) Write a conclusion for these results.

4. Match the correct part of the digestive system to its job.

5. Label this diagram:

……………………

……………………

……………………

……………………

6. Here is a simple food chain.

a) What is the first item in any food chain called?

Prey Producer Predator

b) What do the arrows mean/show?

……………………………………………………………………………………………………………

7. Which is the secondary consumer in this food chain?

8. What do these words mean?a) Herbivore

………………………………………………………………………………………………………………

b) Omnivore

………………………………………………………………………………………………………………

c) Carnivore

………………………………………………………………………………………………………………

Living things and their habitats

Which animals are vertebrates (have backbones)?

Fish have scales and fins and live in water. They lay eggs and are cold blooded.

Amphibians have moist skin and live on land but lay eggs in water. They are cold blooded.

Reptiles have scales and lay eggs on land. They are cold blooded.

Mammals have hair or fur and give birth to live young. They are warm blooded.

Birds have feathers and lay eggs. Most of them can fly. They are warm blooded.

How does a key help us name plants and animals?This key helps you find the names of these four birds. Answer the first question and follow the arrows to the next ones down. Those answers take you to the correct names.

How do you make up your own questions for keys?You can see that the key shown above works by asking questions that have simple yes or no answers.

The first question splits the birds into two groups – ones that swim and ones that don’t. The next row of questions is about the colours of the birds and it takes you to the actual

names.

If you wanted to ask a question that told the difference between a fish and a frog, you should ask about a feature you can easily see. You could ask “has it got legs?” - Yes for a frog, no for a fish.

How do environments change?There are so many people in the world and we all need somewhere to live. A great city like London has some very beautiful buildings, but they are all built where there was once wild countryside. The habitats of the fish, forest animals and plants are gone forever.Other ways environments change:Deforestation: Clearing forests to grow food or build cities. Climate change: significant changes to the temperature or weather of a place over long periods of time. For example the ice is melting in the arctic because of global warming.Pollution: There are many types of pollution. The main four that effect animals are: plastic, air pollution, noise pollution and light pollution.

Questions

1. Tick the warm blooded animals.

Mammal Reptile Amphibian Bird Fish

2. Match the animal with the statements.

3. Use the classification key to classify these monsters.

Does it have a spike on its head?

Does it have two eyes? Does it have spikes going down its back?

A BC D

yes

yes yes

no

no no

I live near water. I have cold blood and my skin is moist. I lay my eggs in water.

I live on land and swim in water. I have scales and I’m cold blooded. I lay my eggs on land.

I live in water. I have scales and fins. My blood is cold and I lay eggs.

My blood is warm and I give birth to live young. I have hair and I live on land.

I am covered in feathers and I have a beak. I lay my eggs on land and I have warm blood.

3. Write questions in the boxes to complete this classification key.

4. When developers build a new housing estate where some fields used to be, what are the problems or dangers caused to wildlife?

………………………………………………………………………………………………………………………………………………………

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5. Litter and pollution in the sea is a danger to wildlife, what can be done to help?

………………………………………………………………………………………………………………………………………………………

………………………………………………………………………………………………………………………………………………………

6. This is an arctic hare. He lives in North America, Nunavut Canada. The arctic hare relies on the snow for camouflage from predators. What do you think would happen to the population if there is an increase in temperature?

……………………………………………………………………………………………………………………………………………………

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