What is the body of scientific knowledge based on?

What is the mass of each element in a 324.8 sample of co2

The same side of the moon always faces earth because the

Polar bears give birth and hunt on sea ice. which of the following would polar bears survive during the melting of arctic ice? growing another layer of fur during summer migrate inland to search for different food sources staying put until the ice refreezes sticking to the usual diet of seals