The turtle's shell would be able to heal and it has two parts, the upper called the carapace and the lower called the plastron.
Yes that's true they do.
A sample of gas will change its shape and size, to take on the exact shape and size of whatever container you put it in.
A change that would most improve his results would be; D) Connecting the galvanometer to the coil
metres to kilometres = 1/1000
8 m ⇒ 0.008 km
metres to centimetres = × 100
8 m ⇒ 800 cm