How well did you do? The answers are:
As a proportion of your body weight, how much does your skeleton weigh?A around 2-3%
How long would it take to send a mobile phone text message (160 characters) underwater, using radio waves ?C between 1 and 10 hours
How much does a water vole have to eat every day to survive (as a proportion of its body weight)?C about 80%
Who first used soil as evidence to convict a criminal?B George Popp
