Research Question
This should be carefully chosen and discussed with your tutor. The research question often forms the overarching research question. A research question need not end with a question mark. Having an open ended question allows you to explore the various issues at play and means that you do not have to provide a single interpretation of the data.
Research Aims
Research aims are statements of intent. They are usually written in broad terms. They set out what you hope to achieve at the end of the project.
Research Objectives
Research objectives, on the other hand, should be specific statements that define measurable outcomes, e.g. what steps will be taken to achieve the desired outcome. These verbs will give you a more measurable outcome: collect, construct, classify, develop, devise, measure, produce, revise, select, synthesise. These verbs provide wider interpretation: appreciate, consider, enquire, learn, know, understand, be aware of, appreciate, listen, perceive.
Try to provide one clear strong aim, it is possible to have more but talk to your tutor about this. There is no fixed number of objectives but you will be required to produce sufficient objectives to be able to measure progress towards meeting the aim/s.
Remember: aims describe what you want to achieve, and objectives describe how you are going to achieve those aims.
Example
Aim
To establish a correlation between academic reading and coursework success
Objectives