Guidelines on how to write scientific lab reports

You: ‘Professor, I saw on the schedule that we would need to write scientific lab reports for our experiments. Should it follow a specific format?’ 

Professor Jones: ‘Yes, all lab reports follow a specific format?’ 

By Fenrizbes - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=15865318

What sections should a scientific lab report include? Should they be in a specific order?

Lab report sections 1:

Title, Aim, Abstract (Summary), Introduction, Materials and Methods (Procedure), Results, Discussion, Conclusion, References

Lab report sections 2:

Title, Introduction, Materials and Methods (Procedure), Results, Discussion, Conclusion, References

Lab report sections 3:

Title, Introduction, Materials and Methods (Procedure), Results, Discussion, Conclusion