1. 1.1-1.2 Study Question Answers
Chemistry

2. 1.1
Photosynthesis
Equation was CO2 + H2O  C6H12O6 + O2

3. 2. Sucrose (or table sugar), carbon dioxide, and water

4. 3. Artificial sweeteners or synthetic fibers

5. 4. Basic research is carried out for the sake of increasing knowledge whereas applied research is carried out to solve a problem.

6. 1.2
1. Has mass and takes up space

7. 2. An atom

8. 3. Elements, element

9. 4. carbon, oxygen, hydrogen

10. 5. compound

11. 6. Water (H2O) and carbon dioxide (CO2)

12. 7. Extensive properties depend on the amount of matter present whereas intensive properties are the same regardless of how much of the substance is present.

13. 8. volume, mass, and amount of energy in a substance

14. 9. Melting point, boiling point, density, and ability to conduct electricity Also: ability to conduct heat

15. 10. A physical property is a characteristic that can be observed or measured without changing the identity of the substance whereas a chemical property is observed when the substance undergoes changes that transform it into a different substance.

16. 11. Melting point and boiling point

17. 12. Ability to burn (combustibility, flammability), ability to rust, and ability to tarnish

18. 13. A physical change does not involve a change in the identity of the substance whereas in a chemical change one or more substances are converted into different substances.

19. 14. grinding, cutting, melting, and boiling

20. 15. Changes of state such as melting and boiling

21. Rusting
Melting
Milk souring
Cooking
Flammable
Tarnishing
Freezing
Evaporating
Corroding
Density
Viscosity
Freezing point
Boiling point
Conducts electricity
Melting point
Buoyancy
Reactivity
Conducts heat
Tooth decaying
Burning
Condensing
Dissolving

22. Rusting – C
Melting – P
Milk souring – C
Cooking – C
Flammable - C
Tarnishing – C
Freezing – P
Evaporating – P
Corroding– C
Density– P
Viscosity– P
Freezing point– P
Boiling point– P
Conducts electricity– P
Melting point– P
Buoyancy– P
Reactivity – C
Conducts heat – P
Tooth decaying– C
Burning – C
Condensing – P
Dissolving – P

23. 4 states of matter
16. Solid has a definite shape and a definite volume
Liquidhas a definite volume but an indefinite shape
Gashas neither a definite shape nor a definite volume
Plasmaa high temperature physical state of matter in which atoms lose most of their electrons

24. 17. Solids particles are held together by strong attractive forces and vibrate about fixed points Liquids particles in a liquid move more rapidly than in a solid, overcoming the strong attractive forces between them and allowing the liquid to flow Gases particles move very rapidly and are at great distances from one another; the attractive forces between gas particles have less of an effect than in liquids and solids

25. 18. Chemical reactions

26. Reactant Reactant Product
carbon oxygen  carbon dioxide

27. 20. yields

28. 21. Although energy can be absorbed or released in a change, it is not destroyed or created. It simply assumes a different form.