Question

Explain how attaching the key to a piece of wood could prevent the key from sinking

Answer 1

Wood floats, whereas the key doesn’t. If you attach the 2 together than the wood would prevent the key from sinking.

Answer 2

It could prevent the key from sinking because the wood would float.

It floats because it weighs less than amount of water it would have to push out of the glass if it sank. Wood, cork, and ice are all less dense than water, and they float; rocks are more dense, so they sink. A key would also be more dense causing it to sink.

Hope this helps,

Davinia.