Aniglooisahousemade oficeor snow.

ApplytheScience 

More Is Better

Thesepenguinswanttobuildaniglooontopofthistable.Theyneedtoliftsomeice.Thebucketoficeisprettyheavy.PollyPenguinhasanideaforhowtoliftittoPeterPenguin.She’sgoingtotrytouseapulley....You cantrythis, too!

Peter

table

chair

Polly

chair

bucketof ice

rope

abroom handle

1

Peterlaysthebroomhandlebetweenthetwochairs.Pollytiesoneendoftheropetotheicebucket.Sheloopstheotherendoftheropearoundthebroomhandle.She’smadeasimplepulley.Shegivestheropeapull,butit’snotenoughtoliftthe bucket.

2

Peterisstillwaitingfortheice.So,Pollytriesanotherapproach.Thistime,shetiesoneendoftheropetothebroomhandle.Sheloopstheropethroughthehandleoftheicebucketandaroundthebroomhandle.Now,Pollyhasmadeacompoundpulley.She’sabletoliftthebucketallthewaytothe top.

3

Peterhastheice,andthepenguinscancontinuetoworkontheirigloo together.