Science questions may be huge:
How many stars are there in the universe?
What bugs are eating my cabbages?
They may be very open questions:
How many insects visit my garden?
or closed questions, with only one answer:
Does a mixture of iron, copper and zinc still act like a magnet?
Many Science questions need answers which have conditions:
What temperature does water boil at?
Water boils at 100 degrees if I am at sea level.