A science essay can be very difficult to write. This is because your task is to give an answer or write about a topic in an expanded form and at the same time show both your knowledge and what you understand about it. Writing essays is widely practiced in science because doing so shows your learning and academic achievement in the subject. Also, science is about explaining things and as a student in it, you have to do this activity yourself. You do not need to worry about doing so, you can use some guidelines to help you.