1. 5 th Grade Science Chapter 3 Vocabulary Mrs. Thornburg’s version

2. Vocabulary in 5 th Grade Science Ch. 3 Physical PropertyMixture Chemical PropertyCompound Change of StateElement Physical ChangeMolecule Chemical ChangeNucleus Chemical ReactionAtom Law of Conservation of Mass

3. What do we call the smallest unit of an element that has the properties of that element?

4. Atom

5. What do we call the central part of an atom, made up of neutrons & protons?

6. Nucleus

7. In chemistry, what do we call a substance that is made of only one kind of atom and cannot be split into a simpler substance?

8. Element

9. What do we call a group of two or more atoms that are joined chemically?

10. Molecule

11. What occurs when matter changes from one state to another, such as from a liquid to a gas?

12. Change of state

13. What do we call a change in which a substance remains the same substance?

14. Physical Change

15. What do we call a combination of two or more different substances?

16. Mixture

17. What do we call a trait, such as color, shape or hardness, that describes a substance by itself?

18. Physical property

19. What do we call a property that involves the ability of a substance to react with other materials to form new substances?

20. Chemical property

21. What do we call a change in which a substance or two becomes a new substance or two?

22. Chemical change

23. What do we call a change in which one or more new substances are formed?

24. Chemical reaction

25. What do we call a substance made of two or more different elements?

26. Compound

27. What do we call it when the mass of the products of a chemical reaction equals that mass of the reactants?

28. Law of conservation of mass