Chemistry Vocabulary List 1

4. A factor in an experiment that is kept constant to ensure a fair test.
5. Distinct states in which matter can exist, including solid, liquid, gas, and plasma.
6. A change that can be undone, allowing the original substance to return.
10. A state of matter that has a definite volume but no definite shape, flowing to fit its container.
11. A mixture where the components remain distinct and can be easily identified, like a salad.
13. A high-energy state of matter where atoms are ionised, found in stars and fluorescent lights.
14. Pure substances that cannot be broken down into simpler substances, made up of one type of atom.
16. A substance formed from two or more elements chemically bonded together in a fixed ratio.
18. A group of two or more atoms bonded together, representing the smallest unit of a compound.
19. A state of matter that has no definite volume or shape, expanding to fill its container.

1. Anything that has mass and takes up space.
2. A change that cannot be undone, resulting in new substances.
3. The capacity to work or produce heat, existing in various forms such as kinetic or potential energy.
4. A process where substances transform into different substances with new properties.
7. A change in a substance's form or appearance without altering its chemical composition.
8. A mixture that has a uniform composition throughout, such as saltwater.
9. The force exerted per unit area, often affecting the behaviour of gases and liquids.
12. The mass of a substance divided by its volume, indicating how compact the matter is.
15. Combinations of two or more substances that retain their individual properties and can be separated.
17. A homogeneous mixture where one substance (solute) is dissolved in another (solvent).