Pyrite is called "fool's gold" because it's looks a lot like gold. which properties can be used to tell gold and pyrite apart?

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation

Which of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.