Answers of Quiz 1742 (Matter)


1. Matter is anything that has mass & occupies space. As: Chair, air, water & everything around us.
2. Matter is composed of atoms.
3. 4 states: Solid, Liquid, Gas & Plasma
4. Solid
5. Liquid
6. Gas
7. Atom is the smallest particle of a matter. It cann't exist freely in nature.
8. Proton, Neutron & Electron
9. Molecule is the smallest particle of matter that can exist in nature. Atoms are combined to make a molecule as one molecule of Water (H2O) has two atoms of Hydrogen & one atom of Oxygen.
10. Element is a chemical substance consisting of atoms having the same number of protons in their atomic nuclei. There are 118 elements that have been identified, of which the 1st 94 occur naturally on Earth with the remaining 24 being synthetic elements.
11. Compound is a substance formed when two or more elements are chemically bonded together.
12. Mixture is a material system made up of two or more different substances which are mixed but are not combined chemically.
13. Melting
14. Sublimation
15. Freezing
16. Boiling
17. Sublimation
18. Condensation
19. Energy is a property of objects which can be transferred to other objects or converted into different forms, but cannot be created or destroyed.
20. Physical Change rearranges molecules but doesn't affect their internal structure. As: dissolving sugar in water.
Chemical Change is any change that results in the formation of new chemical substances. As: eggs cooking.
21. Properties of Metal are shiny, solid, good conductor of heat & electricity.
Properties of Non-metal are weak in nature & poor conductor of heat & electricity.
22. Kinetic Molecular Theory of Matter states that atoms & molecules in a matter are constantly in motion.
23. Physics
24. Chemistry

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