yes, i would probably say that a whale is a fish. dolphins are also fish, i mean duh...?
You'd be wrong. Dolphins and whales are not fish and no amount pluging your ears and yelling "not true, not true, I can't hear you!!!" will ever make that true.
they look like fish, kinda like sharks, and sharks are fish, as far as i know.
Then you don't know very mych do you? Just because A looks similar to B doesn't mean that A is the same thing as B. You didn't even go to a real school did you?
everything is made of the 4 elements.
Did your parents homeshool you in alchemy instead of science?
fish are mostly water element, whales are a combination of water and air.
You are just making this up as you go, aren't you?
lol, what a fairytale... a land? animal turns into a fish
You are the one claiming that "a land animal turns into a fish", people who understand evolutionary theory know that whales and other marine mammals were once semi aquatic land animals that have adapted to live in the water full time. They are still mammals, not fish.
it depends on how you choose to define things
To an extent, yes. But you think you can redefine something and then argue against your "definition" of it, rather than the definition the rest of the world uses.
if scientists definitions were good, religious people would not disagree with them
"Religious people" are not a benchmark by which things are considered good, correct, or anything else. "Religious people" are one of the most diverse and divisive groups on the planet. Why should you get to determin what difines science when you can't even agree on how you define your "god".
Just because a few "religious people" disagree with accepted science doesn't make the science wrong, or any less correct. In fact the majority of christians accept the vast majority of science, so tell me this, what makes you think that your opinion is so infallible that the entirety the scientific community and the vast majority of your own religion should humble themselves before you so you can tell us what we "really" mean?