What Is Matter?
Matter is anything that has mass and takes up space.
About this topic
Matter is anything that has mass and occupies space: air, water, rocks, living things and the screen you're reading. Light and heat, which are forms of energy, are not matter. Everything we can touch is made of tiny particles called atoms, grouped as elements, compounds or mixtures. Chemistry is the study of matter, its properties and how it changes, which is why this idea sits at the very start of the subject.
Mass measures how much matter an object contains and stays the same everywhere, while weight is the pull of gravity on that mass and changes from Earth to the Moon. Volume is the space the matter takes up. A balloon filled with air shows both ideas: air has mass, which you can prove by weighing a flat and an inflated balloon, and it takes up space, because it pushes the rubber outward.
Matter is everywhere in practical life. Engineers choose materials for bridges, cooks rely on how ingredients behave, and doctors design medicines from specific substances. Knowing what matter is lets us ask the next questions: what is it made of and how does it behave?
A common misconception is that gases are not matter because you cannot see them. Wind pushing a sail and a tyre holding up a car show that air is real, massive material. Another is that light is matter; it is energy, so it has no mass in the everyday sense.
Key ideas
- Everything physical is matter
- Made of atoms and molecules
- Energy and light are not matter
Quick check
Use cases: where What Is Matter? helps
- Homework: review the key idea behind What Is Matter? before you start a problem set.
- Exam revision: use the quick check to test whether you can recall What Is Matter? without notes.
- Visual learning: play with the interactive lab to see how What Is Matter? changes when you adjust its inputs.
- Teaching a friend: explain What Is Matter? in your own words, then compare your version with the key ideas.
Chemistry explains medicine, food, cleaning products, fuels and building materials.
Frequently asked questions
What is What Is Matter??
Matter is anything that has mass and takes up space.
What will I learn in What Is Matter??
Everything physical is matter. Made of atoms and molecules. Energy and light are not matter.
Is What Is Matter? part of Chemistry?
Yes. It is one of 150 Chemistry topics on LearnViz HighSchoolEdu, with 3 key ideas, a live animation and a quick check.
Does the What Is Matter? lab work on a phone or tablet?
Yes. The animation resizes to fit your screen and supports touch, so you can drag, tap and slide with your finger.
How should I study What Is Matter??
Read the summary and key ideas first, play with the interactive lab to see the idea in motion, then answer the quick check. If you get a question wrong, go back to the key idea it tests.
Do I need an account, and is my progress saved?
No account is needed. Marking a topic as learned is saved in your own browser, so it stays on that device and is not sent to a server.