It depends on whose evaluating it, I suppose.
Or when you say "science" are you referring to a list of God Haters who cherry pick their evidence and view all of it through the religious perspective of uniformitarianism, abiogenesis, billions of years, information from nothing, material ex nihlo, the uncaused cause, and many other unprovable assumptions? Is that the "science" you are referring to?
Yawn. You can spare me the 'god-hater' hyperbole, thanks.
Let's start with a relatively simple observation, based on events as they are described in the book: where did all the water go?
First, roughly estimate how much water would have been needed to cover the planet to the top of Mt. Everest:
The radius of the Earth is approx. 6370km
The height of Everest above sea-level is approx. 8.8 km
Therefore, the volume of the Earth is approx. 1,082,696,932,000km³, or 1,080 billion cubic kilometers.
The volume of the earth to the height of Everest is 1,087,190,293,000km³
Subtracting the first volume from the second gives approx. 4,493,361,000, or four thousand, five hundred million cubic kilometers of water.
Also, this rain is supposed to have fallen within about 40 days. That means that there would have been about 220 metres of rainfall every day over the entire planet (8800/40 = 220) A few centimetres in a day is considered to be extremely heavy rain. I don't see the ark surviving that sort of blasting, firehose-like rain.
Assuming it was fresh water (as it rained) this would have severely diluted the oceans, causing devastation among the marine creatures. Virtually all sea-life that could not stand brackish water would have been destroyed.
How did so many plants survive being submerged in brackish water for so long? Many plants are quite sensitive to conditions. Take some of your household plants and leave them submerged in the bath or a pond for a year and see how they do.
Then, after the waters subside (where to?) there are still more problems with the story. What happened to all the corpses of the countless numbers of animals and humans that died? Surely there would have been terrible plague and disease caused by all that rotting meat.
Many sea-creatures would have been deposited in places they could not normally reach - inland lakes etc. Is there any evidence of marine fish skeletons being found in high, freshwater lake beds?