answers - living things and their...

8
Year 4 Science Revision Booklet © 2020 twinkl.com Answers - Living Things and their Habitats 1. Write each animal from the word bank into the correct column of the table below: Mammals cow tiger dog dolphin Amphibians frog newt Reptiles snake alligator lizard Fish shark salmon Birds owl robin sparrow Insects spider butterfly wasp Molluscs snail octopus cuttlefish Arthropods crab scorpio shrimp 2. Write down the five groups that vertebrates are divided into: 1. Mammals 2. Birds 3. Fish 4. Reptiles 5. Amphibians 3. Circle the animals in the list below that are vertebrates: 4. Give one example of how climate change and plastic pollution affect the life of an animal. Example answer: The polar bear is most active during winter and spring but because the weather is warmer, the cold season is shorter. This means that the polar bears have to survive longer without food and sadly, many polar bears are dying as a result. penguin squid scorpion snail fly frog shark crocodile worm chimpanzee human tortoise

Upload: others

Post on 17-Aug-2020

1 views

Category:

Documents


0 download

TRANSCRIPT

Page 1: Answers - Living Things and their Habitatss3-eu-west-1.amazonaws.com/smartfile/8f31e6980b1ab7f62a47cb7… · Answers - Living Things and their Habitats 1. Write each animal from the

Year 4 Science Revision Booklet © 2020 twinkl.com

Answers - Living Things and their Habitats

1. Write each animal from the word bank into the correct column of the table below:

Mammals cow tiger dog dolphin

Amphibians frog newt

Reptiles snake alligator lizard

Fish shark salmon

Birds owl robin sparrow

Insects spider butterfly wasp

Molluscs snail octopus cuttlefish

Arthropods crab scorpio shrimp

2. Writedownthefivegroupsthatvertebratesaredividedinto:

1. Mammals

2. Birds

3. Fish

4. Reptiles

5. Amphibians

3. Circletheanimalsinthelistbelowthatarevertebrates:

4. Giveoneexampleofhowclimatechangeandplasticpollutionaffectthelifeofananimal.

Example answer: The polar bear is most active during winter and spring but because the weather is warmer, the cold season is shorter. This means that the polar bears have to survive longer without food and sadly, many polar bears are dying as a result.

penguin

squid

scorpion

snail

fly

frog

shark

crocodile

worm

chimpanzee

human

tortoise

Page 2: Answers - Living Things and their Habitatss3-eu-west-1.amazonaws.com/smartfile/8f31e6980b1ab7f62a47cb7… · Answers - Living Things and their Habitats 1. Write each animal from the

Year 4 Science Revision Booklet © 2020 twinkl.com

Answers - Animals, Including Humans

1. Labelthediagrambelowwiththedifferentpartsofthedigestivesystem.Usethewordbankbelowtohelpyou.

mouth

tongue

teeth

salivary gland

liver

gallbladder

duodenumrectum

oesophagus

stomach

pancreas

anus

large intestine

small inresine

2. Drawlinestomatchthebodypartandadescriptionofitsfunction.

stomach

useschemicalstochangefood intosubstancesthatthebody canuseandgetsridofthings thataretoxic.

smallintestineatubethatmovesfoodfromthemouthtothestomach

oesophagusstoolsarestoredherebeforeleavingthebodythrough theanus

liverfoodisbrokendownwith acid here

rectumwaterisabsorbedfromremainingwastefoodandstoolsareformed

largeintestinewherenutrientsareabsorbedinto the body

Page 3: Answers - Living Things and their Habitatss3-eu-west-1.amazonaws.com/smartfile/8f31e6980b1ab7f62a47cb7… · Answers - Living Things and their Habitats 1. Write each animal from the

Year 4 Science Revision Booklet © 2020 twinkl.com

6. Inthediagrambelow,drawpictureswithlabelstoshowhowthefoodchainworks.Includethewordspredator,producerandpreyinyourdiagram.

Example:

5. Fillinthemissingwordsinthesentencesbelow:

Aherbivoreisananimalthateatsplants.

A animalsisananimalthatfeedsonotheranimals.

Omnivoresareanimalsthateatplants and animals.

3. Labelthediagrambelowwiththefollowing:

4. Writetrueorfalsenexttoeachstatement.

Molarsareusedtobiteandcutfood.False

Caninestearandripfoodinthemouth.True

Wisdomteethhavenofunction.True

Premolarsareusedtoholdandcrushfood.True

incisor

premolar

canine

molar

consumer primary consumer

prey

consumer secondary consumer

predator/prey

producer

consumer tertiary consumer

predator

Page 4: Answers - Living Things and their Habitatss3-eu-west-1.amazonaws.com/smartfile/8f31e6980b1ab7f62a47cb7… · Answers - Living Things and their Habitats 1. Write each animal from the

Year 4 Science Revision Booklet © 2020 twinkl.com

3. What words are used to describe the following processes:

Theparticlesofaliquidbegintoslowdownuntiltheyformasolidstructure. freezing

Theparticlesofasolidareheatedandbegintomovefasterandfasteruntiltheyareabletomoveoverandaroundeach other. melting

4. Label this diagram of the water cycle with the words: condensation, precipitation and evaporation.

Answers - States of Matter

1.

Solid

Condensation

EvaporationPrecipitation

Liquid

GasThesespreadouttocompletelyfillthe

container they are in.

Thesekeeptheirshapeunlessaforceisapplied

to them. They can be hard,softorsquashy.

Takestheshapeofitscontainerbutdoesnotchangetheamountofspacetakenup.

2. Give an example for each state of matter:

Solid = Example answers: rock, cushion, rubber

Liquid=Example answers: water, petrol, milk

Gas=Example answers: oxygen, carbon dioxide, methane

Page 5: Answers - Living Things and their Habitatss3-eu-west-1.amazonaws.com/smartfile/8f31e6980b1ab7f62a47cb7… · Answers - Living Things and their Habitats 1. Write each animal from the

Year 4 Science Revision Booklet © 2020 twinkl.com

5. Fill in the missing words in the sentences below:

Evaporationoccurswhenaliquid

turnsintoagas.

Condensationiswhenwater vapour(gas)

iscooleddownandturnsintowater.

precipitationiswhenliquid(orsolid)particlesfallfromacloudasrain,sleet,hailorsnow.

6. Describe an everyday situation when either evaporation or condensation occurs.

Example answers:

Evaporation occurs everyday when a kettle is boiled. The water is heated and changes from a liquid into a gas.

Condensation occurs everyday when droplets of hot water vapour from a bath or shower hit the cold surface of a mirror or window and change into a liquid.

Page 6: Answers - Living Things and their Habitatss3-eu-west-1.amazonaws.com/smartfile/8f31e6980b1ab7f62a47cb7… · Answers - Living Things and their Habitats 1. Write each animal from the

Year 4 Science Revision Booklet © 2020 twinkl.com

3. Putthefollowingdiagramsinorderofhowhighthepitchwouldbe.

4. Drawvibrationsonthegriddiagrambeloweachstatementtodemonstratetherelationshipbetweenvolumeandamplitude.

Answers - Sound

1. Writetrueorfalsenexttoeachstatement.

2. Drawlinestomatchthewordswiththeirdefinitions.

1 3

24

Soundisatypeofenergy. True

Soundsarecausedbyvibrations. True

Soundcanonlytravelthroughgases. False

Soundtravelsasawave. True

Soundcantravelthroughavacuum. False

volume

amplitude

pitch

howloworhighasoundis

howloudasoundis

thesizeofavibration

Thelargertheamplitude,thelouder

thesound.

Thesmallertheamplitude,thequieter

thesound.

Page 7: Answers - Living Things and their Habitatss3-eu-west-1.amazonaws.com/smartfile/8f31e6980b1ab7f62a47cb7… · Answers - Living Things and their Habitats 1. Write each animal from the

Year 4 Science Revision Booklet © 2020 twinkl.com

5. Use the words in the word bank to complete the passage that explains how we hear sounds. Soundtravelsthroughanobjectastheparticles

vibrate.Thiscanbethroughtheair,through

liquidorthroughasolidobject

suchasatelephone.Thevibrations hit

the eardrumandarethenpassedtothemiddle

and then to the innerear.Theyarethenchanged

into electricalsignalswhicharesenttothebrain.

6. Explain why sound gets fainter as the distance from the sound source grows.

Example answer: The further away from the sound source you are, the fainter the sound will be. This is because as sound vibrations spread out over a distance and become smaller, the sound becomes quieter, just like ripples in a pond.

middle

air

vibrations

inner

particles

liquid

electrical

solid

Page 8: Answers - Living Things and their Habitatss3-eu-west-1.amazonaws.com/smartfile/8f31e6980b1ab7f62a47cb7… · Answers - Living Things and their Habitats 1. Write each animal from the

Year 4 Science Revision Booklet © 2020 twinkl.com

3. Labelthecomponentsinthecircuitsbelow:

4. Fillinthetablewithelectricalconductorsandelectricalinsulators.

5. What is the function of a switch in an electrical circuit? Explain your answer fully.

Example answer: Switches can open or close an electrical circuit. When turned off, a switch breaks the circuit by stopping the flow of electrons. When the switch is turned on, the circuit is complete and the electrons are able to flow around the circuit.

Answers - Electricity

1. Circletheobjectsthatrequireelectricitytowork:

2. Fillinthegapstocompletethepassagebelow:

Acircuitisapathwaythatelectricity canflowaround.

Itincludeswiresandapowersupply(suchasa

battery)andmayincludeothercomponentssuch

asbulbs,switchesorbuzzers. Electrons,

whicharesmallparticles with an electric

charge,flowaroundacompletecircuit.

Electrical conductors Electrical insulators

Examples answers:metal keynailpaper clipcoin

Example answers:paperplastic rulerrubber bandoven gloves

Cell

Wire

Bulbs