A. What is matter ?

1. A. What is matter? • Matter is anything that has mass and takes up space.

2. B. Why is air matter but light is not? • Air has mass and takes up space, while light does not.

3. C. What are physical properties? • Physical Properties of a substance are properties that can be observed without changing the identity of the substance.

4. D. What is the difference between weight and mass? • Mass is the amount of matter in an object. Mass is measured in grams using a balance scale. Mass is constant and does not change when your location changes. Weight is the measurement of the pull of gravity on an object. Weight depends on gravity, which can change depending on where the object is located. Weight is measured in Newtons using a spring scale.

5. E. What is volume? • Volume is the amount of space that matter takes up. The volume of liquid is measured in milliliters using a graduated cylinder. Solids are measured with a ruler in cubic centimeters (cm3) using the formula length x width x height. 1 mL = 1 cm3

6. F. Example of Conductivity: • Aluminum and copper are good conductors. Glass, rubber, and plastic restrict the flow of heat and electricity. They are poor conductors.

7. G. Example of : Malleability: • Gold is very malleable metal it is easy to shape.

8. H. Example of Ductility: • Metals are ductile. Copper is used to produce wires for conducting electricity.

9. I. Example of Hardness: • The harder the material is, the more it resists scratching. Diamonds are the hardest substance.

10. J. How do the physical properties of iron and copper compare? • Iron is attracted to magnets, but copper is not.

11. 6. Which is not a physical property used to identify substances? Pg 57 A. hardness B. odor C. beauty D. color

12. 7. Which tool would be used to measure the mass of an object? pg 57 A. spring scale B. balance C. graduated cylinder D. beaker

13. K. What is density? • Density is the measurement of how much mass fits within a certain volume. Density is measured in grams per cubic centimeter (g/cm3)

14. L. How does density affect an object’s ability to float? • An object floats when its density is less than that of the liquid in which it is place.

15. M. A sheet of aluminum foil is ripped into two smaller pieces. How do the densities of the smaller pieces compare to the density of the original piece? • They are the same.

16. 6. A student knows the mass of an object. What other variable does the student need to know to calculate the object’s density?Pg 67 A. color B. weight C. volume D. length

17. 7. Which would be most useful for identifying an unknown liquid? Pg 67 A. weight B. volume C. mass D. density

18. N. What are states of matter? • A form that matter can take. The 3 states of matter are solid, liquid, and gas.

19. O.

20. O.

21. P. What is temperature? • Temperature is a measure of the average kinetic energy of the particles in a material.

22. Q. Explain what happens to water when you add or remove energy. • If an ice cube absorbs enough energy, it can change into liquid water. If enough energy is added to the liquid water, it can change into a gas. When energy is removed from water vapor it can change into a liquid. Liquid water that loses energy can change into ice.

23. R. What is the following temperature for WATER for each

24. R. What is the following temperature for WATER for each

25. S) Fill in the table below explaining the change in state

26. S) Fill in the table below explaining the change in state

27. 6. Which happens to an object as its temperature increases?Pg 83 A. its mass increases B. Wits particles move more slowly C. its particles move faster D. its particles stop moving

28. 7. During which change of state do the particles in a material become closer?pg 83 A. vaporization B. condensation C. boiling D. melting

29. T. What are chemical properties? • The ability of a substance to combine with or change into one or more new substances.

30. U. What are some examples of flammable/combustible substances? • Paper, wood, hydrogen, gasoline

31. V. What happens when potassium is placed in water? (figure 24) • It reacts violently and often produces fire.

32. W. A substance rusts when exposed to water. Is this a chemical or a physical property? Explain how you know • A chemical property is the ability of a substance to combine with another substance to form a new substance. Since rust forms when exposed to water, it is a chemical property of the substance.

33. 6. Which is a chemical property of a substance?Pg 93 A. density B. mass C. yellow powder D. reacts with water

34. 7. Which warning refers to a chemical property of the material?pg83 A. fragile B. flammable C. handle with care D. shake well

35. X. What is a physical change? • A physical change alters the form of an object without changing what type of matter it is.

36. Y. What are some examples of physical changes? • Change in size and shape, sharpening a pencil, tearing a piece of paper, filtering coffee grounds from water, breaking glass, and cutting fruit

37. Z. What do all physical changes have in common? • All physical changes alter the form of an object without changing what type of matter it is.

38. AA. What is a chemical change? • A chemical change is a change in matter in which the substances that make up the matter change into other substances. A new substance is made with new properties.

39. BB. What are some examples of chemical changes? • Making brownies, mixing baking soda & vinegar

40. CC. What chemical changes affect your life? • Cooking food, burning things to produce heat, or rusting

41. DD. What are some signs that a chemical change might have occurred? • Color change, the release or absorption of energy, the formation of a gas, the formation of a precipitate

42. EE. What sign tells you that a chemical change takes place when you fry an egg? • The egg white changes from clear to white

43. FF. What is a precipitate? • Some chemical changes produce a precipitate which is a solid that forms when two liquids combine The egg white changes from clear to white

44. 6. Which is an example of a chemical change? Pg 105 A. water freezes and forms ice B. a puddle evaporates C. iron rusts D. a soda can is crushed

45. 7. Suppose you mix baking soda and vinegar. What signs might indicate that a chemical change is occurring?pg 105 A. formation of a yellow precipitate B. formation of bubbles C. light is given off D. a color change

46. GG. What happens to atoms during a chemical reaction? • The atoms break their bonds with other atoms and form new bonds with new atoms.

47. HH. Could oxygen be produced from a chemical reaction if none of the reactants contained oxygen atoms? Explain. • No; atoms do not change their identity during a chemical reaction. They just change their associations with other atoms. The atoms rearrange to form a new substance.

48. II. What forms when atoms attach to other atoms? • Chemical bonds are formed when atoms attach to other atoms.

49. JJ. What are chemical equations? • Shorthand for a chemical reaction. A chemical equation helps scientists study a chemical reaction. It tells scientists at a glance the reactants, the products, and the proportions of each substance present in a chemical reaction. Chemical bonds are formed when atoms attach to other atoms.

50. KK. In a chemical equation, what appears to the left of the arrow? • In a chemical equation, the reactants are written to the left of the arrow. • To the right of the arrow? • Products are written to the right of the arrow in a chemical equation.