Float or Sink?
Does a wooden block float or sink?
Float
Which is better for building: paper or wood?
Wood
What do we float boats on?
Water!
What helps things float? (Hint:1 word)
Buoyancy!
What is a raft?
A flat boat that floats!
What happens if you put a rock in water?
It sinks!
What keeps your raft together?
Tape or glue!
Is water a liquid or a solid?
Liquid
What pulls things down into water?
Gravity!
What helps a raft float—being heavy or light?
Light!
Why do some things float?
They're lighter or spread weight out
Why is it good to spread out the weight on a raft?
So it doesn’t tip!
What happens when water moves fast?
It can push or carry things
What happens when we push the raft with our finger?
It moves!
Can a raft carry people or animals?
Yes!
What makes something sink?
Too heavy or not shaped right
What shape helps boats float better, flat or pointy?
Flat
Can boats float in saltwater and freshwater?
Yes!
What helps us test if a raft works?
Put it in water and see!
What do we use to test if our raft works?
Put it in water!
What is the force called that pushes up on floating things?
Buoyancy
What does an engineer do?
Solves problems and builds things!
What happens when you blow on water?
It moves forming waves!
What is “balance”?
When things don’t fall or tip over
Why do we build rafts in groups?
To work together and share ideas!