Simplify the following text for a Grade 9 native English-speaking person.
Original: Although the words `` oils '' , `` fats '' , and `` lipids '' are all used to refer to fats , `` oils '' is usually used to refer to fats that are liquids at normal room temperature , while `` fats '' is usually used to refer to fats that are solids at normal room temperature .
Simplified: The different types of fats are saturated , unsaturated and trans fats . Trans fats are created in the food industry by treating other types of fats and giving them a different structure .