In general, scientific reports follow the same guidelines as other academic writing in terms of style and vocabulary , however, your department may well have its own requirements for the organisation of a report, so it is advisable to

Scientific research is usually conducted in order to support a hypothesis or to validate the work of others. 

A  scientific report is a description of a situation or something that has happened which may describe (choose several correct items):

While essays are often concerned with abstract or theoretical subjects, a report is a description of a situation or something that has happened.

Definitions  are needed in a  paper if the title includes an unfamiliar phrase or if the writer wants to use a term in a special way.

In the sentence "Washington is  less crowded than New York" the underline phrase is a form of  

The comparison might be the subject of the essay or might provide evidence for the argument. In all cases it is important to explain clearly what is being compared and to make the comparison as accurate as possible.

Revealing "cause and effect" lines in your academic writing,  choose the phrases which focuses on causes:

 In an academic discussion, you must show that you are familiar with all the various opinions and positions, including counter-arguments, on the topic and provide reasons to support your own position. 

Choose the phrase which is inappropriate for discussion section of an article: