Biology Internal Assessment Topics: 15+ Sample, Example Topics

June 5, 2021

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The first step to passing a biology internal assessment assignment is to choose the right topic. But where do you even start when you go blank and utterly confused right from the moment you start brainstorming?

In writing, ideas don’t strike out of the blues. That explains why even the smartest students in an IA class may find it challenging to get the best biology IA topics to cover.

So don’t worry if you’re feeling confused or already lost. Because, in this guide, we’ll give you 20+ Biology IA topics that you can copy, paste, and write your assignment on.

Before we give you some Biology IA topics for your Higher Level (HL) class assignment, let’s first make sure you understand what the IB Program is, its objectives as a subject, and what it expects from you.

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What’s IB IA Program?

An IB Internal Assessment is an individual assignment assessed by a subject teacher following a given set of criteria to guide, construct, and evaluate the finished assignment.

These criteria are Communication, Exploration, Personal Engagement, Evaluation, and Analysis.

The objective of IB Internal Assessment is to get you to put your knowledge to use by investigation, observation, and questioning. The program makes up 20% of your final grade as an IB student.

How to Choose the Best Biology Internal Assessment Topic

The IB Biology Internal Assessment topic that you pick may require you to:

  • Use simulation or modeling to construct a detailed analysis
  • Carry out a lab experiment
  • Draw inspiration from the most credible source

Whichever the objective, you need to make sure you choose the best topic, which not only lays the foundation for your investigation but also elicit engagement as you work on the assignment.

To choose the best IB Biology Internal Assessment topic:

Know Your Interests

Instead of picking a topic at random, go through several ideas and choose a topic that interests you. It should be a topic you’re interested in investigating. It can also be a subject line that you’re interested in knowing more about.

The topic you choose shouldn’t be generic, obvious, or simplistic. Also, don’t choose a topic already discussed in class, as such a subject line isn’t original enough to offer any value.

Choose a novel topic instead. Doing so allows you to demonstrate your original thoughts in a way another student in your class can’t.

Be Specific

Many IB students fail their Biology Internal Assessment because they pick generic or simplistic topics at random.

Look at your topic of interest again. How original is the topic? Does the topic give room for proper investigation or originality?

Also, make sure the topic is as specific as possible. Too narrow and you’ll lack a scope. Too broad and you’ll lose focus fast.

Be Realistic

It’s one thing to choose an interesting IB Biology IA topic. It’s another thing to work on it from start to finish. You should also check the feasibility of the topic.

In other words:

  • Do you have the time, resource, and equipment to start and complete the assignment?
  • Are you able to present a relevant hypothesis and define your variables?

Browse Relevant Sources for Topics

You can get topic ideas from anywhere – even for a technical subject such as the IB Biology Internal Assessment.

Browse relevant source to dig up as many topic ideas as you possibly can. For biology, we encourage you to look at websites such as Science Daily and encyclopedia, your school’s online library, and even local library for inspiration.

You’ll get a ton of topic as you browse relevant sources. Some will be too technical, some generic, and some catchy enough. Identify the most focused topics and use them to come up with research questions for the assignment.

Is the Topic Ethical and Safe?

It’s important to note that IB has strict policies that protect animals from harm and or distress.

The rule also requires that you must get people’s consent before involving them in an experiment.

From this statement, it’s clear that IB Biology Internal Assessment is an experimental assignment.

So the topic you choose should be safe, ethical, and environmental friendly.

Biology Internal Assessment Topics

Up until now, you know how to choose an IB Biology IA topic as well as what makes a good topic for your experiment.

Still, the research process can be quite involving, which may not be quite effective if you have a short deadline to complete the assignment.

In the section below, we’ll look at some IB Biology Internal Assessment topics that you use for your next experiment or investigation.

  • Does the distance of plants from a light source affect its photosynthetic activities?
  • Does the variation in temperature affect the rate of transpiration on plants?
  • Comparing the absorption spectra of the different types of olive oil
  • Evaluating the effect of sugar on the health of human’s teeth
  • Does time have an effect on the plasmolysis of potatoes?
  • Evaluating the rate of photosynthesis in a tomato plant by comparing the effect of light quality
  • Are dairy products safe for human and or animal consumption after their best-by date elapse?
  • Toothpastes: Do the different types have different levels of effectiveness?
  • Does the reaction rate in human reduce as we age?
  • Can abiotic factors influence the biodiversity of a given habitat?
  • Does a sudden change in the position of a human body affect heart rate and baroreceptor feedback?
  • Investigating the effect of light levels on the predation of insects
  • Does agarose gel concentration have any effect on the migration of DNA?
  • Analyzing the relationship between microbial activities and the rate of germination
  • What’s the effect of water pollution on marine life?
  • Can you examine the accuracy of color vision with online color tests?
  • How can we compare reaction time with different stimuli with age?
  • Does global warming have any effect on human body?
  • Does sucrose concentration affect the rate of respiration in yeast? 

About the author 

Antony W is a professional writer and coach at Help for Assessment. He spends countless hours every day researching and writing great content filled with expert advice on how to write engaging essays, research papers, and assignments.

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