How does a scientist use maths?
A junior-friendly page showing how a scientist uses measurement, data, fair tests and graphs.
Quick answer
Scientists use maths to measure things, collect and sort data, do fair tests, and show their results on graphs. Maths helps them understand the world around them and solve problems.
Learning outcome
By the end of this page, you will understand how scientists use maths in their work and be able to do simple measurements, sort data, and make a basic graph.
- You can measure length, weight, or time using tools
- You can collect information and sort it into groups
- You can make a simple bar graph to show your results
- You can explain how maths helps scientists understand the world
Why this matters
Science is all about asking questions and finding answers. Maths helps scientists do this by giving them tools to measure, count, and compare things. Whether they're checking how tall a plant grows, how much rain falls, or how fast a car goes, scientists use maths every day. When you do your own science experiments, you're using the same maths skills!
How it works
Scientists use maths in four main ways:
- Measuring – They use rulers, scales, and timers to find out how big, heavy, or fast things are.
- Collecting data – They write down what they find, like how many butterflies they see in a garden.
- Doing fair tests – They make sure only one thing changes at a time, so they know what caused the result.
- Showing results – They use graphs and charts to show their findings clearly.
Examples you can see
Let's imagine you're a young scientist doing a simple experiment.
Measuring
You want to know how tall your sunflower plant is. You use a ruler and find it is 32 centimetres tall. You also weigh it and find it weighs 120 grams.
Collecting data
You decide to see how many different types of leaves your plant has. You count them and record:
- Round leaves – 8
- Pointy leaves – 5
- Long leaves – 7
Doing fair tests
You want to see if adding more water makes your plant grow taller. You water one plant every day and another plant every other day. You measure both plants every week to see which one grows more. This is a fair test because only the watering frequency changes.
Showing results
You draw a bar graph to show how many leaves of each type you found. Each bar is the same width, and the height shows how many leaves.
Try it as a mini adventure
Adventure: The Garden Scientist
You are a scientist in your garden! You have a mission to find out which type of plant grows fastest in your garden. You will:
- Plant 3 different types of seeds in your garden (let's say sunflowers, marigolds, and beans)
- Measure the height of each plant every day for a week
- Record how many days it took each plant to grow 5cm
- Draw a bar graph to show which plant grew fastest
4th day: You measure your sunflower and it is 12cm tall. You measure your marigold and it is 8cm tall. You measure your bean and it is 15cm tall.
6th day: Your sunflower is 18cm tall. Your marigold is 12cm tall. Your bean is 21cm tall.
7th day: Your sunflower is 22cm tall. Your marigold is 15cm tall. Your bean is 25cm tall.
End of week: You count how many days each plant took to grow 5cm and draw a graph.
Common mistakes
- Mistake: Forgetting to use the same unit of measurement.
Why it happens: You might measure one thing in centimetres and another in metres.
Fix: Always use the same unit, like centimetres for all your measurements. - Mistake: Not doing a fair test by changing more than one thing at once.
Why it happens: You might change both water and sunlight at the same time.
Fix: Change only one thing at a time, like only water or only sunlight. - Mistake: Drawing a graph with bars that are not the right height.
Why it happens: You might make a bar go up to 10 when it should go up to 7.
Fix: Count your data carefully and make sure each bar matches your numbers.
Parent and carer guide
As a parent or carer, you can help your child understand how scientists use maths by:
- Encouraging your child to measure things at home – like how tall they are, how much their pet weighs, or how long it takes to walk to the shop.
- Doing simple experiments together, like testing which type of paper holds more water or which ball bounces highest.
- Helping them record data in a table or chart, and then drawing a graph to show the results.
- Using everyday situations to talk about maths – like when you cook, shop, or go for a walk.
- Practising with a ruler, scale, or timer to build confidence in measuring.
Remember, it's okay if your child makes mistakes – they are part of learning! Be patient and encourage them to keep trying.
Practice questions
What are the four main ways scientists use maths?
Answer: Measuring, collecting data, doing fair tests, and showing results with graphs.Why do scientists do fair tests?
Answer: To make sure only one thing changes at a time so they know what caused the result.You measure a plant and find it is 25cm tall. What unit are you using?
Answer: Centimetres.How can you show your science data on a graph?
Answer: By making a bar graph or line graph where the height of the bar shows the amount.If you have 3 plants and measure their heights as 10cm, 15cm, and 20cm, what is the difference between the tallest and shortest?
Answer: 10cm (20cm - 10cm).
FAQ
What kind of maths do scientists use?
Scientists use all kinds of maths including counting, measuring, adding, subtracting, comparing, and using graphs to show their results.
Do scientists need to be good at maths?
Yes, maths helps scientists understand the world better. Even simple maths like counting and measuring is important.
Can I be a scientist if I’m not good at maths?
Yes! You can be a scientist even if you find maths hard. You can start by doing fun experiments and learning how maths helps you understand science.
How can I practice using maths like a scientist?
You can measure things at home, do simple experiments, record what you find, and draw graphs to show your results.
Are there any jobs that don’t use maths?
No job is completely without maths. Even jobs like art, cooking, or playing music use maths in some way.