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5. After three days the level of the water in a glass became lower, what change did the matter go? a. physical becadse it became less b. both physical and chemical c. chemical because water disappeared d. physical because water became a gas 6. A sponge can absorb and hold water. What property of matter does it show? a brittleness b. porosity c. hardness d. ductility 7. What do you think will happen to the resulting sugar mixture when 20 mL sugar is added to 50 ml wate a. The combined volume is less than the sum of 20 mL sugar and 50 ml water. b. The combined volume is equal to the sum of 20 mL sugar and 50 ml water a. The combined volume is greater than the sum of 20 ml sugar and 50 mL water. d. The combined volume is equal to the sum of 20 ml sugar and 20 ml water. 8. Which of the following is a negatively charged particle in an atom? a. proton b. electron C. neutron a nucleon 9. Which of the following is the unit used for atontic mass? a, milligram b. microgram c. atomic mass unit d. atomic number 10. Which particle was the last to be discovered because it is uncharged? a. electron b. proton c. W-vector boson d. neutron 11. Which of the following are samples of matter? a. sugar granules, water, stone and leaves c heat, smoke and light b. leaves, heat, smoke and grain of salt d. heat and light 12. Which of the following is a negatively charged particle in an atom? b. electron a proton d. nucieon c. neutron 13. Which is an example of physical change? d. burning of peper c. dissolving salt in water b. tarnishing silver
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