Today we were still thinking of floating and sinking.
We think that heavy things sink and that light things float.
Teacher had a big heavy shell.
The odd thing about the shell is that it floated if we put it one way but sank if we turned it upside down.
33 passengers is a lot in one boat!
Next we tried floating a marla raft.
It wouldn't float at all, not even when we turned up the sides. We think a raft made of marla doesn't trap any air and that is why it always sinks. If you want a raft to float we think you should make it out of a material that likes to float (like wood).
Our bests boat of all held 45 passengers! That seems to be the safest boat to ride in.