When writing your assignments at university you will be expected to use 'academic' writing, which is quite a different type of writing to what you are used to doing for every day purposes.
The purpose of academic writing is to communicate with subject specialists in the language of the discipline, to demonstrate problem solving & critical thinking skills - interpret & analyse data, to develop arguments based on reasoning, draw conclusions based on evidence, make rational judgments.
Have a look at the following modules to gain an understanding about science communication skills & the process to follow for writing academically:
Communicating your ideas to the general public is a very different style of writing to academic writing that is required from you for your assignments at university.
When your audience is the everyday person in the street it requires you to approach the task of conveying what you want them to understand from their perspective, i.e as a non expert on the topic.
Have a look at some tips on how you might go about writing for the general public: