1.1-1.2 Study Question Answers

Chemistry

1.1

1. PhotosynthesisEquation was CO2 + H2O C6H12O6 + O2

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

3. Artificial sweeteners or synthetic fibers

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

1.2

1. Has mass and takes up space

2. An atom

3. Elements, element

4. carbon, oxygen, hydrogen

5. compound

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

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.

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

9. Melting point, boiling point, density, and ability to conduct electricity

Also: ability to conduct heat

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.

11. Melting point and boiling point

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

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.

14. grinding, cutting, melting, and boiling

15. Changes of state such as melting and boiling

Rusting MeltingMilk souring CookingFlammable TarnishingFreezing EvaporatingCorroding DensityViscosity Freezing pointBoiling point Conducts electricity

Melting point BuoyancyReactivity Conducts heatTooth decaying BurningCondensing Dissolving

Rusting – C Melting – P Milk souring – C Cooking – CFlammable - C Tarnishing – CFreezing – P Evaporating – PCorroding– C Density– PViscosity– 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

4 states of matter

16. Solid has a definite shape and a definite volume

Liquidhas a definite volume but an indefinite shape

Gashas neither a definite shape nor a definite volume

Plasmaa high temperature physical state of matter in which atoms lose most of their electrons

17. Solids particles are held together by strong attractive forces and vibrate about fixed pointsLiquids particles in a liquid move more rapidly than in a solid, overcoming the strong attractive forces between them and allowing the liquid to flowGases 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

18. Chemical reactions

19.Reactant Reactant Productcarbon + oxygen carbon dioxide

20. yields

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