An igloo is a house made of ice or snow.
Apply the Science
Polly and Peter want to build an igloo. They need to lift ice to the table. The ice bucket is heavy. Polly has an idea. She’s going to use a pulley. You can try this, too!
Peter
table
chair
Polly
chair
bucket of ice
rope
a broom handle
1
Peter puts a broom handle between two chairs. Polly ties one end of the rope to the ice bucket. She loops the other end of the rope around the broom handle. She’s made a simple pulley. She gives the rope a pull. It’s not enough to lift the bucket!
2
Polly tries again. She ties one end of the rope to the broom handle. She loops the rest of the rope around the handle. Polly has made a compound pulley. She lifts the bucket to the table.
3
Polly and Peter can build their igloo.